diff --git a/examples/fastpb_gen/base.pb.fast.go b/examples/fastpb_gen/base.pb.fast.go
index d9f51be..057d68c 100644
--- a/examples/fastpb_gen/base.pb.fast.go
+++ b/examples/fastpb_gen/base.pb.fast.go
@@ -172,7 +172,7 @@ func (x *Base) fastWriteField1(buf []byte) (offset int) {
 	if x.LogID == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 1, x.LogID)
+	offset += fastpb.WriteString(buf[offset:], 1, x.GetLogID())
 	return offset
 }
 
@@ -180,7 +180,7 @@ func (x *Base) fastWriteField2(buf []byte) (offset int) {
 	if x.Caller == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 2, x.Caller)
+	offset += fastpb.WriteString(buf[offset:], 2, x.GetCaller())
 	return offset
 }
 
@@ -188,7 +188,7 @@ func (x *Base) fastWriteField3(buf []byte) (offset int) {
 	if x.Addr == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 3, x.Addr)
+	offset += fastpb.WriteString(buf[offset:], 3, x.GetAddr())
 	return offset
 }
 
@@ -196,7 +196,7 @@ func (x *Base) fastWriteField4(buf []byte) (offset int) {
 	if x.Client == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 4, x.Client)
+	offset += fastpb.WriteString(buf[offset:], 4, x.GetClient())
 	return offset
 }
 
@@ -204,7 +204,7 @@ func (x *Base) fastWriteField6(buf []byte) (offset int) {
 	if x.Extra == nil {
 		return offset
 	}
-	for k, v := range x.Extra {
+	for k, v := range x.GetExtra() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 6,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -230,7 +230,7 @@ func (x *BaseResp) fastWriteField1(buf []byte) (offset int) {
 	if x.StatusMessage == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 1, x.StatusMessage)
+	offset += fastpb.WriteString(buf[offset:], 1, x.GetStatusMessage())
 	return offset
 }
 
@@ -238,7 +238,7 @@ func (x *BaseResp) fastWriteField2(buf []byte) (offset int) {
 	if x.StatusCode == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 2, x.StatusCode)
+	offset += fastpb.WriteInt32(buf[offset:], 2, x.GetStatusCode())
 	return offset
 }
 
@@ -246,7 +246,7 @@ func (x *BaseResp) fastWriteField3(buf []byte) (offset int) {
 	if x.Extra == nil {
 		return offset
 	}
-	for k, v := range x.Extra {
+	for k, v := range x.GetExtra() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 3,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -274,7 +274,7 @@ func (x *Base) sizeField1() (n int) {
 	if x.LogID == "" {
 		return n
 	}
-	n += fastpb.SizeString(1, x.LogID)
+	n += fastpb.SizeString(1, x.GetLogID())
 	return n
 }
 
@@ -282,7 +282,7 @@ func (x *Base) sizeField2() (n int) {
 	if x.Caller == "" {
 		return n
 	}
-	n += fastpb.SizeString(2, x.Caller)
+	n += fastpb.SizeString(2, x.GetCaller())
 	return n
 }
 
@@ -290,7 +290,7 @@ func (x *Base) sizeField3() (n int) {
 	if x.Addr == "" {
 		return n
 	}
-	n += fastpb.SizeString(3, x.Addr)
+	n += fastpb.SizeString(3, x.GetAddr())
 	return n
 }
 
@@ -298,7 +298,7 @@ func (x *Base) sizeField4() (n int) {
 	if x.Client == "" {
 		return n
 	}
-	n += fastpb.SizeString(4, x.Client)
+	n += fastpb.SizeString(4, x.GetClient())
 	return n
 }
 
@@ -306,7 +306,7 @@ func (x *Base) sizeField6() (n int) {
 	if x.Extra == nil {
 		return n
 	}
-	for k, v := range x.Extra {
+	for k, v := range x.GetExtra() {
 		n += fastpb.SizeMapEntry(6,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -332,7 +332,7 @@ func (x *BaseResp) sizeField1() (n int) {
 	if x.StatusMessage == "" {
 		return n
 	}
-	n += fastpb.SizeString(1, x.StatusMessage)
+	n += fastpb.SizeString(1, x.GetStatusMessage())
 	return n
 }
 
@@ -340,7 +340,7 @@ func (x *BaseResp) sizeField2() (n int) {
 	if x.StatusCode == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(2, x.StatusCode)
+	n += fastpb.SizeInt32(2, x.GetStatusCode())
 	return n
 }
 
@@ -348,7 +348,7 @@ func (x *BaseResp) sizeField3() (n int) {
 	if x.Extra == nil {
 		return n
 	}
-	for k, v := range x.Extra {
+	for k, v := range x.GetExtra() {
 		n += fastpb.SizeMapEntry(3,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
diff --git a/examples/fastpb_gen/base.pb.go b/examples/fastpb_gen/base.pb.go
index 6c5af2a..76ccbdb 100644
--- a/examples/fastpb_gen/base.pb.go
+++ b/examples/fastpb_gen/base.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.0
-// 	protoc        v3.21.3
+// 	protoc        v3.21.12
 // source: base.proto
 
 package fastpb_gen
diff --git a/examples/fastpb_gen/echo.pb.fast.go b/examples/fastpb_gen/echo.pb.fast.go
index 1d36d8c..163121d 100644
--- a/examples/fastpb_gen/echo.pb.fast.go
+++ b/examples/fastpb_gen/echo.pb.fast.go
@@ -1056,7 +1056,7 @@ func (x *Message) fastWriteField1(buf []byte) (offset int) {
 	if x.Field1 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteDouble(buf[offset:], 1, x.Field1)
+	offset += fastpb.WriteDouble(buf[offset:], 1, x.GetField1())
 	return offset
 }
 
@@ -1064,7 +1064,7 @@ func (x *Message) fastWriteField2(buf []byte) (offset int) {
 	if x.Field2 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteFloat(buf[offset:], 2, x.Field2)
+	offset += fastpb.WriteFloat(buf[offset:], 2, x.GetField2())
 	return offset
 }
 
@@ -1072,7 +1072,7 @@ func (x *Message) fastWriteField3(buf []byte) (offset int) {
 	if x.Field3 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 3, x.Field3)
+	offset += fastpb.WriteInt32(buf[offset:], 3, x.GetField3())
 	return offset
 }
 
@@ -1080,7 +1080,7 @@ func (x *Message) fastWriteField4(buf []byte) (offset int) {
 	if x.Field4 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt64(buf[offset:], 4, x.Field4)
+	offset += fastpb.WriteInt64(buf[offset:], 4, x.GetField4())
 	return offset
 }
 
@@ -1088,7 +1088,7 @@ func (x *Message) fastWriteField5(buf []byte) (offset int) {
 	if x.Field5 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteUint32(buf[offset:], 5, x.Field5)
+	offset += fastpb.WriteUint32(buf[offset:], 5, x.GetField5())
 	return offset
 }
 
@@ -1096,7 +1096,7 @@ func (x *Message) fastWriteField6(buf []byte) (offset int) {
 	if x.Field6 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteUint64(buf[offset:], 6, x.Field6)
+	offset += fastpb.WriteUint64(buf[offset:], 6, x.GetField6())
 	return offset
 }
 
@@ -1104,7 +1104,7 @@ func (x *Message) fastWriteField7(buf []byte) (offset int) {
 	if x.Field7 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteSint32(buf[offset:], 7, x.Field7)
+	offset += fastpb.WriteSint32(buf[offset:], 7, x.GetField7())
 	return offset
 }
 
@@ -1112,7 +1112,7 @@ func (x *Message) fastWriteField8(buf []byte) (offset int) {
 	if x.Field8 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteSint64(buf[offset:], 8, x.Field8)
+	offset += fastpb.WriteSint64(buf[offset:], 8, x.GetField8())
 	return offset
 }
 
@@ -1120,7 +1120,7 @@ func (x *Message) fastWriteField9(buf []byte) (offset int) {
 	if x.Field9 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteFixed32(buf[offset:], 9, x.Field9)
+	offset += fastpb.WriteFixed32(buf[offset:], 9, x.GetField9())
 	return offset
 }
 
@@ -1128,7 +1128,7 @@ func (x *Message) fastWriteField10(buf []byte) (offset int) {
 	if x.Field10 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteFixed64(buf[offset:], 10, x.Field10)
+	offset += fastpb.WriteFixed64(buf[offset:], 10, x.GetField10())
 	return offset
 }
 
@@ -1136,7 +1136,7 @@ func (x *Message) fastWriteField11(buf []byte) (offset int) {
 	if x.Field11 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteSfixed32(buf[offset:], 11, x.Field11)
+	offset += fastpb.WriteSfixed32(buf[offset:], 11, x.GetField11())
 	return offset
 }
 
@@ -1144,7 +1144,7 @@ func (x *Message) fastWriteField12(buf []byte) (offset int) {
 	if x.Field12 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteSfixed64(buf[offset:], 12, x.Field12)
+	offset += fastpb.WriteSfixed64(buf[offset:], 12, x.GetField12())
 	return offset
 }
 
@@ -1152,7 +1152,7 @@ func (x *Message) fastWriteField13(buf []byte) (offset int) {
 	if !x.Field13 {
 		return offset
 	}
-	offset += fastpb.WriteBool(buf[offset:], 13, x.Field13)
+	offset += fastpb.WriteBool(buf[offset:], 13, x.GetField13())
 	return offset
 }
 
@@ -1160,7 +1160,7 @@ func (x *Message) fastWriteField14(buf []byte) (offset int) {
 	if x.Field14 == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 14, x.Field14)
+	offset += fastpb.WriteString(buf[offset:], 14, x.GetField14())
 	return offset
 }
 
@@ -1168,7 +1168,7 @@ func (x *Message) fastWriteField15(buf []byte) (offset int) {
 	if len(x.Field15) == 0 {
 		return offset
 	}
-	offset += fastpb.WriteBytes(buf[offset:], 15, x.Field15)
+	offset += fastpb.WriteBytes(buf[offset:], 15, x.GetField15())
 	return offset
 }
 
@@ -1176,7 +1176,7 @@ func (x *Message) fastWriteField16(buf []byte) (offset int) {
 	if x.Field16 == nil {
 		return offset
 	}
-	offset += fastpb.WriteMessage(buf[offset:], 16, x.Field16)
+	offset += fastpb.WriteMessage(buf[offset:], 16, x.GetField16())
 	return offset
 }
 
@@ -1184,8 +1184,8 @@ func (x *Message) fastWriteField20(buf []byte) (offset int) {
 	if len(x.Field20) == 0 {
 		return offset
 	}
-	for i := range x.Field20 {
-		offset += fastpb.WriteString(buf[offset:], 20, x.Field20[i])
+	for i := range x.GetField20() {
+		offset += fastpb.WriteString(buf[offset:], 20, x.GetField20()[i])
 	}
 	return offset
 }
@@ -1194,8 +1194,8 @@ func (x *Message) fastWriteField21(buf []byte) (offset int) {
 	if x.Field21 == nil {
 		return offset
 	}
-	for i := range x.Field21 {
-		offset += fastpb.WriteMessage(buf[offset:], 21, x.Field21[i])
+	for i := range x.GetField21() {
+		offset += fastpb.WriteMessage(buf[offset:], 21, x.GetField21()[i])
 	}
 	return offset
 }
@@ -1204,7 +1204,7 @@ func (x *Message) fastWriteField22(buf []byte) (offset int) {
 	if x.Field22 == nil {
 		return offset
 	}
-	for k, v := range x.Field22 {
+	for k, v := range x.GetField22() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 22,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -1220,7 +1220,7 @@ func (x *Message) fastWriteField23(buf []byte) (offset int) {
 	if x.Field23 == nil {
 		return offset
 	}
-	for k, v := range x.Field23 {
+	for k, v := range x.GetField23() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 23,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -1236,7 +1236,7 @@ func (x *Message) fastWriteField24(buf []byte) (offset int) {
 	if x.Field24 == nil {
 		return offset
 	}
-	for k, v := range x.Field24 {
+	for k, v := range x.GetField24() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 24,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -1252,7 +1252,7 @@ func (x *Message) fastWriteField27(buf []byte) (offset int) {
 	if x.Field27 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 27, int32(x.Field27))
+	offset += fastpb.WriteInt32(buf[offset:], 27, int32(x.GetField27()))
 	return offset
 }
 
@@ -1260,10 +1260,10 @@ func (x *Message) fastWriteField28(buf []byte) (offset int) {
 	if len(x.Field28) == 0 {
 		return offset
 	}
-	offset += fastpb.WriteListPacked(buf[offset:], 28, len(x.Field28),
+	offset += fastpb.WriteListPacked(buf[offset:], 28, len(x.GetField28()),
 		func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 			offset := 0
-			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.Field28[numIdxOrVal]))
+			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.GetField28()[numIdxOrVal]))
 			return offset
 		})
 	return offset
@@ -1273,7 +1273,7 @@ func (x *Message) fastWriteField29(buf []byte) (offset int) {
 	if x.Field29 == nil {
 		return offset
 	}
-	for k, v := range x.Field29 {
+	for k, v := range x.GetField29() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 29,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -1289,7 +1289,7 @@ func (x *Message) fastWriteField30(buf []byte) (offset int) {
 	if x.Field30 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 30, int32(x.Field30))
+	offset += fastpb.WriteInt32(buf[offset:], 30, int32(x.GetField30()))
 	return offset
 }
 
@@ -1297,10 +1297,10 @@ func (x *Message) fastWriteField31(buf []byte) (offset int) {
 	if len(x.Field31) == 0 {
 		return offset
 	}
-	offset += fastpb.WriteListPacked(buf[offset:], 31, len(x.Field31),
+	offset += fastpb.WriteListPacked(buf[offset:], 31, len(x.GetField31()),
 		func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 			offset := 0
-			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.Field31[numIdxOrVal]))
+			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.GetField31()[numIdxOrVal]))
 			return offset
 		})
 	return offset
@@ -1310,7 +1310,7 @@ func (x *Message) fastWriteField32(buf []byte) (offset int) {
 	if x.Field32 == nil {
 		return offset
 	}
-	for k, v := range x.Field32 {
+	for k, v := range x.GetField32() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 32,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -1326,7 +1326,7 @@ func (x *Message) fastWriteField33(buf []byte) (offset int) {
 	if x.Field33 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 33, int32(x.Field33))
+	offset += fastpb.WriteInt32(buf[offset:], 33, int32(x.GetField33()))
 	return offset
 }
 
@@ -1334,10 +1334,10 @@ func (x *Message) fastWriteField34(buf []byte) (offset int) {
 	if len(x.Field34) == 0 {
 		return offset
 	}
-	offset += fastpb.WriteListPacked(buf[offset:], 34, len(x.Field34),
+	offset += fastpb.WriteListPacked(buf[offset:], 34, len(x.GetField34()),
 		func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 			offset := 0
-			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.Field34[numIdxOrVal]))
+			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.GetField34()[numIdxOrVal]))
 			return offset
 		})
 	return offset
@@ -1347,7 +1347,7 @@ func (x *Message) fastWriteField35(buf []byte) (offset int) {
 	if x.Field35 == nil {
 		return offset
 	}
-	for k, v := range x.Field35 {
+	for k, v := range x.GetField35() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 35,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -1363,7 +1363,7 @@ func (x *Message) fastWriteField36(buf []byte) (offset int) {
 	if x.Field36 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 36, int32(x.Field36))
+	offset += fastpb.WriteInt32(buf[offset:], 36, int32(x.GetField36()))
 	return offset
 }
 
@@ -1371,10 +1371,10 @@ func (x *Message) fastWriteField37(buf []byte) (offset int) {
 	if len(x.Field37) == 0 {
 		return offset
 	}
-	offset += fastpb.WriteListPacked(buf[offset:], 37, len(x.Field37),
+	offset += fastpb.WriteListPacked(buf[offset:], 37, len(x.GetField37()),
 		func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 			offset := 0
-			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.Field37[numIdxOrVal]))
+			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.GetField37()[numIdxOrVal]))
 			return offset
 		})
 	return offset
@@ -1384,7 +1384,7 @@ func (x *Message) fastWriteField38(buf []byte) (offset int) {
 	if x.Field38 == nil {
 		return offset
 	}
-	for k, v := range x.Field38 {
+	for k, v := range x.GetField38() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 38,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -1440,7 +1440,7 @@ func (x *Message) fastWriteField50(buf []byte) (offset int) {
 	if x.Field50 == nil {
 		return offset
 	}
-	offset += fastpb.WriteMessage(buf[offset:], 50, x.Field50)
+	offset += fastpb.WriteMessage(buf[offset:], 50, x.GetField50())
 	return offset
 }
 
@@ -1448,7 +1448,7 @@ func (x *Message) fastWriteField51(buf []byte) (offset int) {
 	if x.Field51 == nil {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 51, *x.Field51)
+	offset += fastpb.WriteInt32(buf[offset:], 51, x.GetField51())
 	return offset
 }
 
@@ -1456,7 +1456,7 @@ func (x *Message) fastWriteField52(buf []byte) (offset int) {
 	if x.Field52 == nil {
 		return offset
 	}
-	offset += fastpb.WriteInt64(buf[offset:], 52, *x.Field52)
+	offset += fastpb.WriteInt64(buf[offset:], 52, x.GetField52())
 	return offset
 }
 
@@ -1464,7 +1464,7 @@ func (x *Message) fastWriteField53(buf []byte) (offset int) {
 	if x.Field53 == nil {
 		return offset
 	}
-	offset += fastpb.WriteUint32(buf[offset:], 53, *x.Field53)
+	offset += fastpb.WriteUint32(buf[offset:], 53, x.GetField53())
 	return offset
 }
 
@@ -1472,7 +1472,7 @@ func (x *Message) fastWriteField54(buf []byte) (offset int) {
 	if x.Field54 == nil {
 		return offset
 	}
-	offset += fastpb.WriteUint64(buf[offset:], 54, *x.Field54)
+	offset += fastpb.WriteUint64(buf[offset:], 54, x.GetField54())
 	return offset
 }
 
@@ -1480,7 +1480,7 @@ func (x *Message) fastWriteField55(buf []byte) (offset int) {
 	if x.Field55 == nil {
 		return offset
 	}
-	offset += fastpb.WriteSint32(buf[offset:], 55, *x.Field55)
+	offset += fastpb.WriteSint32(buf[offset:], 55, x.GetField55())
 	return offset
 }
 
@@ -1488,7 +1488,7 @@ func (x *Message) fastWriteField56(buf []byte) (offset int) {
 	if x.Field56 == nil {
 		return offset
 	}
-	offset += fastpb.WriteSint64(buf[offset:], 56, *x.Field56)
+	offset += fastpb.WriteSint64(buf[offset:], 56, x.GetField56())
 	return offset
 }
 
@@ -1496,7 +1496,7 @@ func (x *Message) fastWriteField57(buf []byte) (offset int) {
 	if x.Field57 == nil {
 		return offset
 	}
-	offset += fastpb.WriteBool(buf[offset:], 57, *x.Field57)
+	offset += fastpb.WriteBool(buf[offset:], 57, x.GetField57())
 	return offset
 }
 
@@ -1504,7 +1504,7 @@ func (x *Message) fastWriteField58(buf []byte) (offset int) {
 	if x.Field58 == nil {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 58, *x.Field58)
+	offset += fastpb.WriteString(buf[offset:], 58, x.GetField58())
 	return offset
 }
 
@@ -1512,7 +1512,7 @@ func (x *Message) fastWriteField59(buf []byte) (offset int) {
 	if x.Field59 == nil {
 		return offset
 	}
-	offset += fastpb.WriteMessage(buf[offset:], 59, x.Field59)
+	offset += fastpb.WriteMessage(buf[offset:], 59, x.GetField59())
 	return offset
 }
 
@@ -1530,7 +1530,7 @@ func (x *Request) fastWriteField1(buf []byte) (offset int) {
 	if x.Message == nil {
 		return offset
 	}
-	offset += fastpb.WriteMessage(buf[offset:], 1, x.Message)
+	offset += fastpb.WriteMessage(buf[offset:], 1, x.GetMessage())
 	return offset
 }
 
@@ -1538,7 +1538,7 @@ func (x *Request) fastWriteField2(buf []byte) (offset int) {
 	if x.Req == nil {
 		return offset
 	}
-	offset += fastpb.WriteMessage(buf[offset:], 2, x.Req)
+	offset += fastpb.WriteMessage(buf[offset:], 2, x.GetReq())
 	return offset
 }
 
@@ -1546,7 +1546,7 @@ func (x *Request) fastWriteField255(buf []byte) (offset int) {
 	if x.Base == nil {
 		return offset
 	}
-	offset += fastpb.WriteMessage(buf[offset:], 255, x.Base)
+	offset += fastpb.WriteMessage(buf[offset:], 255, x.GetBase())
 	return offset
 }
 
@@ -1564,7 +1564,7 @@ func (x *Response) fastWriteField1(buf []byte) (offset int) {
 	if x.Action == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 1, x.Action)
+	offset += fastpb.WriteString(buf[offset:], 1, x.GetAction())
 	return offset
 }
 
@@ -1572,7 +1572,7 @@ func (x *Response) fastWriteField2(buf []byte) (offset int) {
 	if x.Msg == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 2, x.Msg)
+	offset += fastpb.WriteString(buf[offset:], 2, x.GetMsg())
 	return offset
 }
 
@@ -1580,7 +1580,7 @@ func (x *Response) fastWriteField255(buf []byte) (offset int) {
 	if x.BaseResp == nil {
 		return offset
 	}
-	offset += fastpb.WriteMessage(buf[offset:], 255, x.BaseResp)
+	offset += fastpb.WriteMessage(buf[offset:], 255, x.GetBaseResp())
 	return offset
 }
 
@@ -1614,7 +1614,7 @@ func (x *Message_Condition) fastWriteField4(buf []byte) (offset int) {
 	if !x.Field4 {
 		return offset
 	}
-	offset += fastpb.WriteBool(buf[offset:], 4, x.Field4)
+	offset += fastpb.WriteBool(buf[offset:], 4, x.GetField4())
 	return offset
 }
 
@@ -1631,7 +1631,7 @@ func (x *Message_ConditionTree) fastWriteField1(buf []byte) (offset int) {
 	if x.Field1 == nil {
 		return offset
 	}
-	for k, v := range x.Field1 {
+	for k, v := range x.GetField1() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 1,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -1647,8 +1647,8 @@ func (x *Message_ConditionTree) fastWriteField2(buf []byte) (offset int) {
 	if x.Field2 == nil {
 		return offset
 	}
-	for i := range x.Field2 {
-		offset += fastpb.WriteMessage(buf[offset:], 2, x.Field2[i])
+	for i := range x.GetField2() {
+		offset += fastpb.WriteMessage(buf[offset:], 2, x.GetField2()[i])
 	}
 	return offset
 }
@@ -1712,7 +1712,7 @@ func (x *Message) sizeField1() (n int) {
 	if x.Field1 == 0 {
 		return n
 	}
-	n += fastpb.SizeDouble(1, x.Field1)
+	n += fastpb.SizeDouble(1, x.GetField1())
 	return n
 }
 
@@ -1720,7 +1720,7 @@ func (x *Message) sizeField2() (n int) {
 	if x.Field2 == 0 {
 		return n
 	}
-	n += fastpb.SizeFloat(2, x.Field2)
+	n += fastpb.SizeFloat(2, x.GetField2())
 	return n
 }
 
@@ -1728,7 +1728,7 @@ func (x *Message) sizeField3() (n int) {
 	if x.Field3 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(3, x.Field3)
+	n += fastpb.SizeInt32(3, x.GetField3())
 	return n
 }
 
@@ -1736,7 +1736,7 @@ func (x *Message) sizeField4() (n int) {
 	if x.Field4 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt64(4, x.Field4)
+	n += fastpb.SizeInt64(4, x.GetField4())
 	return n
 }
 
@@ -1744,7 +1744,7 @@ func (x *Message) sizeField5() (n int) {
 	if x.Field5 == 0 {
 		return n
 	}
-	n += fastpb.SizeUint32(5, x.Field5)
+	n += fastpb.SizeUint32(5, x.GetField5())
 	return n
 }
 
@@ -1752,7 +1752,7 @@ func (x *Message) sizeField6() (n int) {
 	if x.Field6 == 0 {
 		return n
 	}
-	n += fastpb.SizeUint64(6, x.Field6)
+	n += fastpb.SizeUint64(6, x.GetField6())
 	return n
 }
 
@@ -1760,7 +1760,7 @@ func (x *Message) sizeField7() (n int) {
 	if x.Field7 == 0 {
 		return n
 	}
-	n += fastpb.SizeSint32(7, x.Field7)
+	n += fastpb.SizeSint32(7, x.GetField7())
 	return n
 }
 
@@ -1768,7 +1768,7 @@ func (x *Message) sizeField8() (n int) {
 	if x.Field8 == 0 {
 		return n
 	}
-	n += fastpb.SizeSint64(8, x.Field8)
+	n += fastpb.SizeSint64(8, x.GetField8())
 	return n
 }
 
@@ -1776,7 +1776,7 @@ func (x *Message) sizeField9() (n int) {
 	if x.Field9 == 0 {
 		return n
 	}
-	n += fastpb.SizeFixed32(9, x.Field9)
+	n += fastpb.SizeFixed32(9, x.GetField9())
 	return n
 }
 
@@ -1784,7 +1784,7 @@ func (x *Message) sizeField10() (n int) {
 	if x.Field10 == 0 {
 		return n
 	}
-	n += fastpb.SizeFixed64(10, x.Field10)
+	n += fastpb.SizeFixed64(10, x.GetField10())
 	return n
 }
 
@@ -1792,7 +1792,7 @@ func (x *Message) sizeField11() (n int) {
 	if x.Field11 == 0 {
 		return n
 	}
-	n += fastpb.SizeSfixed32(11, x.Field11)
+	n += fastpb.SizeSfixed32(11, x.GetField11())
 	return n
 }
 
@@ -1800,7 +1800,7 @@ func (x *Message) sizeField12() (n int) {
 	if x.Field12 == 0 {
 		return n
 	}
-	n += fastpb.SizeSfixed64(12, x.Field12)
+	n += fastpb.SizeSfixed64(12, x.GetField12())
 	return n
 }
 
@@ -1808,7 +1808,7 @@ func (x *Message) sizeField13() (n int) {
 	if !x.Field13 {
 		return n
 	}
-	n += fastpb.SizeBool(13, x.Field13)
+	n += fastpb.SizeBool(13, x.GetField13())
 	return n
 }
 
@@ -1816,7 +1816,7 @@ func (x *Message) sizeField14() (n int) {
 	if x.Field14 == "" {
 		return n
 	}
-	n += fastpb.SizeString(14, x.Field14)
+	n += fastpb.SizeString(14, x.GetField14())
 	return n
 }
 
@@ -1824,7 +1824,7 @@ func (x *Message) sizeField15() (n int) {
 	if len(x.Field15) == 0 {
 		return n
 	}
-	n += fastpb.SizeBytes(15, x.Field15)
+	n += fastpb.SizeBytes(15, x.GetField15())
 	return n
 }
 
@@ -1832,7 +1832,7 @@ func (x *Message) sizeField16() (n int) {
 	if x.Field16 == nil {
 		return n
 	}
-	n += fastpb.SizeMessage(16, x.Field16)
+	n += fastpb.SizeMessage(16, x.GetField16())
 	return n
 }
 
@@ -1840,8 +1840,8 @@ func (x *Message) sizeField20() (n int) {
 	if len(x.Field20) == 0 {
 		return n
 	}
-	for i := range x.Field20 {
-		n += fastpb.SizeString(20, x.Field20[i])
+	for i := range x.GetField20() {
+		n += fastpb.SizeString(20, x.GetField20()[i])
 	}
 	return n
 }
@@ -1850,8 +1850,8 @@ func (x *Message) sizeField21() (n int) {
 	if x.Field21 == nil {
 		return n
 	}
-	for i := range x.Field21 {
-		n += fastpb.SizeMessage(21, x.Field21[i])
+	for i := range x.GetField21() {
+		n += fastpb.SizeMessage(21, x.GetField21()[i])
 	}
 	return n
 }
@@ -1860,7 +1860,7 @@ func (x *Message) sizeField22() (n int) {
 	if x.Field22 == nil {
 		return n
 	}
-	for k, v := range x.Field22 {
+	for k, v := range x.GetField22() {
 		n += fastpb.SizeMapEntry(22,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -1876,7 +1876,7 @@ func (x *Message) sizeField23() (n int) {
 	if x.Field23 == nil {
 		return n
 	}
-	for k, v := range x.Field23 {
+	for k, v := range x.GetField23() {
 		n += fastpb.SizeMapEntry(23,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -1892,7 +1892,7 @@ func (x *Message) sizeField24() (n int) {
 	if x.Field24 == nil {
 		return n
 	}
-	for k, v := range x.Field24 {
+	for k, v := range x.GetField24() {
 		n += fastpb.SizeMapEntry(24,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -1908,7 +1908,7 @@ func (x *Message) sizeField27() (n int) {
 	if x.Field27 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(27, int32(x.Field27))
+	n += fastpb.SizeInt32(27, int32(x.GetField27()))
 	return n
 }
 
@@ -1916,10 +1916,10 @@ func (x *Message) sizeField28() (n int) {
 	if len(x.Field28) == 0 {
 		return n
 	}
-	n += fastpb.SizeListPacked(28, len(x.Field28),
+	n += fastpb.SizeListPacked(28, len(x.GetField28()),
 		func(numTagOrKey, numIdxOrVal int32) int {
 			n := 0
-			n += fastpb.SizeInt32(numTagOrKey, int32(x.Field28[numIdxOrVal]))
+			n += fastpb.SizeInt32(numTagOrKey, int32(x.GetField28()[numIdxOrVal]))
 			return n
 		})
 	return n
@@ -1929,7 +1929,7 @@ func (x *Message) sizeField29() (n int) {
 	if x.Field29 == nil {
 		return n
 	}
-	for k, v := range x.Field29 {
+	for k, v := range x.GetField29() {
 		n += fastpb.SizeMapEntry(29,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -1945,7 +1945,7 @@ func (x *Message) sizeField30() (n int) {
 	if x.Field30 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(30, int32(x.Field30))
+	n += fastpb.SizeInt32(30, int32(x.GetField30()))
 	return n
 }
 
@@ -1953,10 +1953,10 @@ func (x *Message) sizeField31() (n int) {
 	if len(x.Field31) == 0 {
 		return n
 	}
-	n += fastpb.SizeListPacked(31, len(x.Field31),
+	n += fastpb.SizeListPacked(31, len(x.GetField31()),
 		func(numTagOrKey, numIdxOrVal int32) int {
 			n := 0
-			n += fastpb.SizeInt32(numTagOrKey, int32(x.Field31[numIdxOrVal]))
+			n += fastpb.SizeInt32(numTagOrKey, int32(x.GetField31()[numIdxOrVal]))
 			return n
 		})
 	return n
@@ -1966,7 +1966,7 @@ func (x *Message) sizeField32() (n int) {
 	if x.Field32 == nil {
 		return n
 	}
-	for k, v := range x.Field32 {
+	for k, v := range x.GetField32() {
 		n += fastpb.SizeMapEntry(32,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -1982,7 +1982,7 @@ func (x *Message) sizeField33() (n int) {
 	if x.Field33 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(33, int32(x.Field33))
+	n += fastpb.SizeInt32(33, int32(x.GetField33()))
 	return n
 }
 
@@ -1990,10 +1990,10 @@ func (x *Message) sizeField34() (n int) {
 	if len(x.Field34) == 0 {
 		return n
 	}
-	n += fastpb.SizeListPacked(34, len(x.Field34),
+	n += fastpb.SizeListPacked(34, len(x.GetField34()),
 		func(numTagOrKey, numIdxOrVal int32) int {
 			n := 0
-			n += fastpb.SizeInt32(numTagOrKey, int32(x.Field34[numIdxOrVal]))
+			n += fastpb.SizeInt32(numTagOrKey, int32(x.GetField34()[numIdxOrVal]))
 			return n
 		})
 	return n
@@ -2003,7 +2003,7 @@ func (x *Message) sizeField35() (n int) {
 	if x.Field35 == nil {
 		return n
 	}
-	for k, v := range x.Field35 {
+	for k, v := range x.GetField35() {
 		n += fastpb.SizeMapEntry(35,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -2019,7 +2019,7 @@ func (x *Message) sizeField36() (n int) {
 	if x.Field36 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(36, int32(x.Field36))
+	n += fastpb.SizeInt32(36, int32(x.GetField36()))
 	return n
 }
 
@@ -2027,10 +2027,10 @@ func (x *Message) sizeField37() (n int) {
 	if len(x.Field37) == 0 {
 		return n
 	}
-	n += fastpb.SizeListPacked(37, len(x.Field37),
+	n += fastpb.SizeListPacked(37, len(x.GetField37()),
 		func(numTagOrKey, numIdxOrVal int32) int {
 			n := 0
-			n += fastpb.SizeInt32(numTagOrKey, int32(x.Field37[numIdxOrVal]))
+			n += fastpb.SizeInt32(numTagOrKey, int32(x.GetField37()[numIdxOrVal]))
 			return n
 		})
 	return n
@@ -2040,7 +2040,7 @@ func (x *Message) sizeField38() (n int) {
 	if x.Field38 == nil {
 		return n
 	}
-	for k, v := range x.Field38 {
+	for k, v := range x.GetField38() {
 		n += fastpb.SizeMapEntry(38,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -2096,7 +2096,7 @@ func (x *Message) sizeField50() (n int) {
 	if x.Field50 == nil {
 		return n
 	}
-	n += fastpb.SizeMessage(50, x.Field50)
+	n += fastpb.SizeMessage(50, x.GetField50())
 	return n
 }
 
@@ -2104,7 +2104,7 @@ func (x *Message) sizeField51() (n int) {
 	if x.Field51 == nil {
 		return n
 	}
-	n += fastpb.SizeInt32(51, *x.Field51)
+	n += fastpb.SizeInt32(51, x.GetField51())
 	return n
 }
 
@@ -2112,7 +2112,7 @@ func (x *Message) sizeField52() (n int) {
 	if x.Field52 == nil {
 		return n
 	}
-	n += fastpb.SizeInt64(52, *x.Field52)
+	n += fastpb.SizeInt64(52, x.GetField52())
 	return n
 }
 
@@ -2120,7 +2120,7 @@ func (x *Message) sizeField53() (n int) {
 	if x.Field53 == nil {
 		return n
 	}
-	n += fastpb.SizeUint32(53, *x.Field53)
+	n += fastpb.SizeUint32(53, x.GetField53())
 	return n
 }
 
@@ -2128,7 +2128,7 @@ func (x *Message) sizeField54() (n int) {
 	if x.Field54 == nil {
 		return n
 	}
-	n += fastpb.SizeUint64(54, *x.Field54)
+	n += fastpb.SizeUint64(54, x.GetField54())
 	return n
 }
 
@@ -2136,7 +2136,7 @@ func (x *Message) sizeField55() (n int) {
 	if x.Field55 == nil {
 		return n
 	}
-	n += fastpb.SizeSint32(55, *x.Field55)
+	n += fastpb.SizeSint32(55, x.GetField55())
 	return n
 }
 
@@ -2144,7 +2144,7 @@ func (x *Message) sizeField56() (n int) {
 	if x.Field56 == nil {
 		return n
 	}
-	n += fastpb.SizeSint64(56, *x.Field56)
+	n += fastpb.SizeSint64(56, x.GetField56())
 	return n
 }
 
@@ -2152,7 +2152,7 @@ func (x *Message) sizeField57() (n int) {
 	if x.Field57 == nil {
 		return n
 	}
-	n += fastpb.SizeBool(57, *x.Field57)
+	n += fastpb.SizeBool(57, x.GetField57())
 	return n
 }
 
@@ -2160,7 +2160,7 @@ func (x *Message) sizeField58() (n int) {
 	if x.Field58 == nil {
 		return n
 	}
-	n += fastpb.SizeString(58, *x.Field58)
+	n += fastpb.SizeString(58, x.GetField58())
 	return n
 }
 
@@ -2168,7 +2168,7 @@ func (x *Message) sizeField59() (n int) {
 	if x.Field59 == nil {
 		return n
 	}
-	n += fastpb.SizeMessage(59, x.Field59)
+	n += fastpb.SizeMessage(59, x.GetField59())
 	return n
 }
 
@@ -2186,7 +2186,7 @@ func (x *Request) sizeField1() (n int) {
 	if x.Message == nil {
 		return n
 	}
-	n += fastpb.SizeMessage(1, x.Message)
+	n += fastpb.SizeMessage(1, x.GetMessage())
 	return n
 }
 
@@ -2194,7 +2194,7 @@ func (x *Request) sizeField2() (n int) {
 	if x.Req == nil {
 		return n
 	}
-	n += fastpb.SizeMessage(2, x.Req)
+	n += fastpb.SizeMessage(2, x.GetReq())
 	return n
 }
 
@@ -2202,7 +2202,7 @@ func (x *Request) sizeField255() (n int) {
 	if x.Base == nil {
 		return n
 	}
-	n += fastpb.SizeMessage(255, x.Base)
+	n += fastpb.SizeMessage(255, x.GetBase())
 	return n
 }
 
@@ -2220,7 +2220,7 @@ func (x *Response) sizeField1() (n int) {
 	if x.Action == "" {
 		return n
 	}
-	n += fastpb.SizeString(1, x.Action)
+	n += fastpb.SizeString(1, x.GetAction())
 	return n
 }
 
@@ -2228,7 +2228,7 @@ func (x *Response) sizeField2() (n int) {
 	if x.Msg == "" {
 		return n
 	}
-	n += fastpb.SizeString(2, x.Msg)
+	n += fastpb.SizeString(2, x.GetMsg())
 	return n
 }
 
@@ -2236,7 +2236,7 @@ func (x *Response) sizeField255() (n int) {
 	if x.BaseResp == nil {
 		return n
 	}
-	n += fastpb.SizeMessage(255, x.BaseResp)
+	n += fastpb.SizeMessage(255, x.GetBaseResp())
 	return n
 }
 
@@ -2270,7 +2270,7 @@ func (x *Message_Condition) sizeField4() (n int) {
 	if !x.Field4 {
 		return n
 	}
-	n += fastpb.SizeBool(4, x.Field4)
+	n += fastpb.SizeBool(4, x.GetField4())
 	return n
 }
 
@@ -2287,7 +2287,7 @@ func (x *Message_ConditionTree) sizeField1() (n int) {
 	if x.Field1 == nil {
 		return n
 	}
-	for k, v := range x.Field1 {
+	for k, v := range x.GetField1() {
 		n += fastpb.SizeMapEntry(1,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -2303,8 +2303,8 @@ func (x *Message_ConditionTree) sizeField2() (n int) {
 	if x.Field2 == nil {
 		return n
 	}
-	for i := range x.Field2 {
-		n += fastpb.SizeMessage(2, x.Field2[i])
+	for i := range x.GetField2() {
+		n += fastpb.SizeMessage(2, x.GetField2()[i])
 	}
 	return n
 }
diff --git a/examples/fastpb_gen/echo.pb.go b/examples/fastpb_gen/echo.pb.go
index b0f22da..3d4d989 100644
--- a/examples/fastpb_gen/echo.pb.go
+++ b/examples/fastpb_gen/echo.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.0
-// 	protoc        v3.21.3
+// 	protoc        v3.21.12
 // source: echo.proto
 
 package fastpb_gen
@@ -381,7 +381,7 @@ func (x *Message) GetField30() nested.MsgEnum {
 	if x != nil {
 		return x.Field30
 	}
-	return nested.MsgEnum_ENUM0
+	return nested.MsgEnum(0)
 }
 
 func (x *Message) GetField31() []nested.MsgEnum {
diff --git a/examples/fastpb_gen/mount/mount.pb.fast.go b/examples/fastpb_gen/mount/mount.pb.fast.go
new file mode 100644
index 0000000..0f3dd52
--- /dev/null
+++ b/examples/fastpb_gen/mount/mount.pb.fast.go
@@ -0,0 +1,140 @@
+// Code generated by Fastpb v0.0.2. DO NOT EDIT.
+
+package mount
+
+import (
+	fmt "fmt"
+	fastpb "github.com/cloudwego/fastpb"
+	player "github.com/cloudwego/fastpb/examples/fastpb_gen/user/player"
+)
+
+var (
+	_ = fmt.Errorf
+	_ = fastpb.Skip
+)
+
+func (x *Mount) FastRead(buf []byte, _type int8, number int32) (offset int, err error) {
+	switch number {
+	case 1:
+		offset, err = x.fastReadField1(buf, _type)
+		if err != nil {
+			goto ReadFieldError
+		}
+	case 3:
+		offset, err = x.fastReadField3(buf, _type)
+		if err != nil {
+			goto ReadFieldError
+		}
+	case 4:
+		offset, err = x.fastReadField4(buf, _type)
+		if err != nil {
+			goto ReadFieldError
+		}
+	default:
+		offset, err = fastpb.Skip(buf, _type, number)
+		if err != nil {
+			goto SkipFieldError
+		}
+	}
+	return offset, nil
+SkipFieldError:
+	return offset, fmt.Errorf("%T cannot parse invalid wire-format data, error: %s", x, err)
+ReadFieldError:
+	return offset, fmt.Errorf("%T read field %d '%s' error: %s", x, number, fieldIDToName_Mount[number], err)
+}
+
+func (x *Mount) fastReadField1(buf []byte, _type int8) (offset int, err error) {
+	x.Name, offset, err = fastpb.ReadString(buf, _type)
+	return offset, err
+}
+
+func (x *Mount) fastReadField3(buf []byte, _type int8) (offset int, err error) {
+	x.Owner, offset, err = fastpb.ReadString(buf, _type)
+	return offset, err
+}
+
+func (x *Mount) fastReadField4(buf []byte, _type int8) (offset int, err error) {
+	var v int32
+	v, offset, err = fastpb.ReadInt32(buf, _type)
+	if err != nil {
+		return offset, err
+	}
+	x.Kind = player.PlayerKind(v)
+	return offset, nil
+}
+
+func (x *Mount) FastWrite(buf []byte) (offset int) {
+	if x == nil {
+		return offset
+	}
+	offset += x.fastWriteField1(buf[offset:])
+	offset += x.fastWriteField3(buf[offset:])
+	offset += x.fastWriteField4(buf[offset:])
+	return offset
+}
+
+func (x *Mount) fastWriteField1(buf []byte) (offset int) {
+	if x.Name == "" {
+		return offset
+	}
+	offset += fastpb.WriteString(buf[offset:], 1, x.GetName())
+	return offset
+}
+
+func (x *Mount) fastWriteField3(buf []byte) (offset int) {
+	if x.Owner == "" {
+		return offset
+	}
+	offset += fastpb.WriteString(buf[offset:], 3, x.GetOwner())
+	return offset
+}
+
+func (x *Mount) fastWriteField4(buf []byte) (offset int) {
+	if x.Kind == 0 {
+		return offset
+	}
+	offset += fastpb.WriteInt32(buf[offset:], 4, int32(x.GetKind()))
+	return offset
+}
+
+func (x *Mount) Size() (n int) {
+	if x == nil {
+		return n
+	}
+	n += x.sizeField1()
+	n += x.sizeField3()
+	n += x.sizeField4()
+	return n
+}
+
+func (x *Mount) sizeField1() (n int) {
+	if x.Name == "" {
+		return n
+	}
+	n += fastpb.SizeString(1, x.GetName())
+	return n
+}
+
+func (x *Mount) sizeField3() (n int) {
+	if x.Owner == "" {
+		return n
+	}
+	n += fastpb.SizeString(3, x.GetOwner())
+	return n
+}
+
+func (x *Mount) sizeField4() (n int) {
+	if x.Kind == 0 {
+		return n
+	}
+	n += fastpb.SizeInt32(4, int32(x.GetKind()))
+	return n
+}
+
+var fieldIDToName_Mount = map[int32]string{
+	1: "Name",
+	3: "Owner",
+	4: "Kind",
+}
+
+var _ = player.File_user_player_player_proto
diff --git a/examples/fastpb_gen/mount/mount.pb.go b/examples/fastpb_gen/mount/mount.pb.go
new file mode 100644
index 0000000..583f060
--- /dev/null
+++ b/examples/fastpb_gen/mount/mount.pb.go
@@ -0,0 +1,169 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.0
+// 	protoc        v3.21.12
+// source: mount/mount.proto
+
+package mount
+
+import (
+	player "github.com/cloudwego/fastpb/examples/fastpb_gen/user/player"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Mount struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name  string            `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	Owner string            `protobuf:"bytes,3,opt,name=owner,proto3" json:"owner,omitempty"`
+	Kind  player.PlayerKind `protobuf:"varint,4,opt,name=kind,proto3,enum=player.PlayerKind" json:"kind,omitempty"`
+}
+
+func (x *Mount) Reset() {
+	*x = Mount{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_mount_mount_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Mount) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Mount) ProtoMessage() {}
+
+func (x *Mount) ProtoReflect() protoreflect.Message {
+	mi := &file_mount_mount_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Mount.ProtoReflect.Descriptor instead.
+func (*Mount) Descriptor() ([]byte, []int) {
+	return file_mount_mount_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Mount) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Mount) GetOwner() string {
+	if x != nil {
+		return x.Owner
+	}
+	return ""
+}
+
+func (x *Mount) GetKind() player.PlayerKind {
+	if x != nil {
+		return x.Kind
+	}
+	return player.PlayerKind(0)
+}
+
+var File_mount_mount_proto protoreflect.FileDescriptor
+
+var file_mount_mount_proto_rawDesc = []byte{
+	0x0a, 0x11, 0x6d, 0x6f, 0x75, 0x6e, 0x74, 0x2f, 0x6d, 0x6f, 0x75, 0x6e, 0x74, 0x2e, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x12, 0x05, 0x6d, 0x6f, 0x75, 0x6e, 0x74, 0x1a, 0x18, 0x75, 0x73, 0x65, 0x72,
+	0x2f, 0x70, 0x6c, 0x61, 0x79, 0x65, 0x72, 0x2f, 0x70, 0x6c, 0x61, 0x79, 0x65, 0x72, 0x2e, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x22, 0x59, 0x0a, 0x05, 0x4d, 0x6f, 0x75, 0x6e, 0x74, 0x12, 0x12, 0x0a,
+	0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d,
+	0x65, 0x12, 0x14, 0x0a, 0x05, 0x6f, 0x77, 0x6e, 0x65, 0x72, 0x18, 0x03, 0x20, 0x01, 0x28, 0x09,
+	0x52, 0x05, 0x6f, 0x77, 0x6e, 0x65, 0x72, 0x12, 0x26, 0x0a, 0x04, 0x6b, 0x69, 0x6e, 0x64, 0x18,
+	0x04, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x12, 0x2e, 0x70, 0x6c, 0x61, 0x79, 0x65, 0x72, 0x2e, 0x50,
+	0x6c, 0x61, 0x79, 0x65, 0x72, 0x4b, 0x69, 0x6e, 0x64, 0x52, 0x04, 0x6b, 0x69, 0x6e, 0x64, 0x42,
+	0x3d, 0x5a, 0x3b, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x63, 0x6c,
+	0x6f, 0x75, 0x64, 0x77, 0x65, 0x67, 0x6f, 0x2f, 0x66, 0x61, 0x73, 0x74, 0x70, 0x62, 0x2f, 0x65,
+	0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x73, 0x2f, 0x66, 0x61, 0x73, 0x74, 0x70, 0x62, 0x5f, 0x67,
+	0x65, 0x6e, 0x2f, 0x6d, 0x6f, 0x75, 0x6e, 0x74, 0x3b, 0x6d, 0x6f, 0x75, 0x6e, 0x74, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_mount_mount_proto_rawDescOnce sync.Once
+	file_mount_mount_proto_rawDescData = file_mount_mount_proto_rawDesc
+)
+
+func file_mount_mount_proto_rawDescGZIP() []byte {
+	file_mount_mount_proto_rawDescOnce.Do(func() {
+		file_mount_mount_proto_rawDescData = protoimpl.X.CompressGZIP(file_mount_mount_proto_rawDescData)
+	})
+	return file_mount_mount_proto_rawDescData
+}
+
+var file_mount_mount_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_mount_mount_proto_goTypes = []interface{}{
+	(*Mount)(nil),          // 0: mount.Mount
+	(player.PlayerKind)(0), // 1: player.PlayerKind
+}
+var file_mount_mount_proto_depIdxs = []int32{
+	1, // 0: mount.Mount.kind:type_name -> player.PlayerKind
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_mount_mount_proto_init() }
+func file_mount_mount_proto_init() {
+	if File_mount_mount_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_mount_mount_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Mount); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_mount_mount_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_mount_mount_proto_goTypes,
+		DependencyIndexes: file_mount_mount_proto_depIdxs,
+		MessageInfos:      file_mount_mount_proto_msgTypes,
+	}.Build()
+	File_mount_mount_proto = out.File
+	file_mount_mount_proto_rawDesc = nil
+	file_mount_mount_proto_goTypes = nil
+	file_mount_mount_proto_depIdxs = nil
+}
diff --git a/examples/fastpb_gen/nested/nested.pb.fast.go b/examples/fastpb_gen/nested/nested.pb.fast.go
index 3e92d54..107563b 100644
--- a/examples/fastpb_gen/nested/nested.pb.fast.go
+++ b/examples/fastpb_gen/nested/nested.pb.fast.go
@@ -594,7 +594,7 @@ func (x *Message) fastWriteField1(buf []byte) (offset int) {
 	if x.Field1 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteDouble(buf[offset:], 1, x.Field1)
+	offset += fastpb.WriteDouble(buf[offset:], 1, x.GetField1())
 	return offset
 }
 
@@ -602,7 +602,7 @@ func (x *Message) fastWriteField2(buf []byte) (offset int) {
 	if x.Field2 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteFloat(buf[offset:], 2, x.Field2)
+	offset += fastpb.WriteFloat(buf[offset:], 2, x.GetField2())
 	return offset
 }
 
@@ -610,7 +610,7 @@ func (x *Message) fastWriteField3(buf []byte) (offset int) {
 	if x.Field3 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 3, x.Field3)
+	offset += fastpb.WriteInt32(buf[offset:], 3, x.GetField3())
 	return offset
 }
 
@@ -618,7 +618,7 @@ func (x *Message) fastWriteField4(buf []byte) (offset int) {
 	if x.Field4 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt64(buf[offset:], 4, x.Field4)
+	offset += fastpb.WriteInt64(buf[offset:], 4, x.GetField4())
 	return offset
 }
 
@@ -626,7 +626,7 @@ func (x *Message) fastWriteField5(buf []byte) (offset int) {
 	if x.Field5 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteUint32(buf[offset:], 5, x.Field5)
+	offset += fastpb.WriteUint32(buf[offset:], 5, x.GetField5())
 	return offset
 }
 
@@ -634,7 +634,7 @@ func (x *Message) fastWriteField6(buf []byte) (offset int) {
 	if x.Field6 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteUint64(buf[offset:], 6, x.Field6)
+	offset += fastpb.WriteUint64(buf[offset:], 6, x.GetField6())
 	return offset
 }
 
@@ -642,7 +642,7 @@ func (x *Message) fastWriteField7(buf []byte) (offset int) {
 	if x.Field7 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteSint32(buf[offset:], 7, x.Field7)
+	offset += fastpb.WriteSint32(buf[offset:], 7, x.GetField7())
 	return offset
 }
 
@@ -650,7 +650,7 @@ func (x *Message) fastWriteField8(buf []byte) (offset int) {
 	if x.Field8 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteSint64(buf[offset:], 8, x.Field8)
+	offset += fastpb.WriteSint64(buf[offset:], 8, x.GetField8())
 	return offset
 }
 
@@ -658,7 +658,7 @@ func (x *Message) fastWriteField9(buf []byte) (offset int) {
 	if x.Field9 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteFixed32(buf[offset:], 9, x.Field9)
+	offset += fastpb.WriteFixed32(buf[offset:], 9, x.GetField9())
 	return offset
 }
 
@@ -666,7 +666,7 @@ func (x *Message) fastWriteField10(buf []byte) (offset int) {
 	if x.Field10 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteFixed64(buf[offset:], 10, x.Field10)
+	offset += fastpb.WriteFixed64(buf[offset:], 10, x.GetField10())
 	return offset
 }
 
@@ -674,7 +674,7 @@ func (x *Message) fastWriteField11(buf []byte) (offset int) {
 	if x.Field11 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteSfixed32(buf[offset:], 11, x.Field11)
+	offset += fastpb.WriteSfixed32(buf[offset:], 11, x.GetField11())
 	return offset
 }
 
@@ -682,7 +682,7 @@ func (x *Message) fastWriteField12(buf []byte) (offset int) {
 	if x.Field12 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteSfixed64(buf[offset:], 12, x.Field12)
+	offset += fastpb.WriteSfixed64(buf[offset:], 12, x.GetField12())
 	return offset
 }
 
@@ -690,7 +690,7 @@ func (x *Message) fastWriteField13(buf []byte) (offset int) {
 	if !x.Field13 {
 		return offset
 	}
-	offset += fastpb.WriteBool(buf[offset:], 13, x.Field13)
+	offset += fastpb.WriteBool(buf[offset:], 13, x.GetField13())
 	return offset
 }
 
@@ -698,7 +698,7 @@ func (x *Message) fastWriteField14(buf []byte) (offset int) {
 	if x.Field14 == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 14, x.Field14)
+	offset += fastpb.WriteString(buf[offset:], 14, x.GetField14())
 	return offset
 }
 
@@ -706,7 +706,7 @@ func (x *Message) fastWriteField15(buf []byte) (offset int) {
 	if len(x.Field15) == 0 {
 		return offset
 	}
-	offset += fastpb.WriteBytes(buf[offset:], 15, x.Field15)
+	offset += fastpb.WriteBytes(buf[offset:], 15, x.GetField15())
 	return offset
 }
 
@@ -714,7 +714,7 @@ func (x *Message) fastWriteField16(buf []byte) (offset int) {
 	if x.Field16 == nil {
 		return offset
 	}
-	offset += fastpb.WriteMessage(buf[offset:], 16, x.Field16)
+	offset += fastpb.WriteMessage(buf[offset:], 16, x.GetField16())
 	return offset
 }
 
@@ -722,8 +722,8 @@ func (x *Message) fastWriteField20(buf []byte) (offset int) {
 	if len(x.Field20) == 0 {
 		return offset
 	}
-	for i := range x.Field20 {
-		offset += fastpb.WriteString(buf[offset:], 20, x.Field20[i])
+	for i := range x.GetField20() {
+		offset += fastpb.WriteString(buf[offset:], 20, x.GetField20()[i])
 	}
 	return offset
 }
@@ -732,8 +732,8 @@ func (x *Message) fastWriteField21(buf []byte) (offset int) {
 	if x.Field21 == nil {
 		return offset
 	}
-	for i := range x.Field21 {
-		offset += fastpb.WriteMessage(buf[offset:], 21, x.Field21[i])
+	for i := range x.GetField21() {
+		offset += fastpb.WriteMessage(buf[offset:], 21, x.GetField21()[i])
 	}
 	return offset
 }
@@ -742,7 +742,7 @@ func (x *Message) fastWriteField22(buf []byte) (offset int) {
 	if x.Field22 == nil {
 		return offset
 	}
-	for k, v := range x.Field22 {
+	for k, v := range x.GetField22() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 22,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -758,7 +758,7 @@ func (x *Message) fastWriteField23(buf []byte) (offset int) {
 	if x.Field23 == nil {
 		return offset
 	}
-	for k, v := range x.Field23 {
+	for k, v := range x.GetField23() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 23,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -774,7 +774,7 @@ func (x *Message) fastWriteField33(buf []byte) (offset int) {
 	if x.Field33 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 33, int32(x.Field33))
+	offset += fastpb.WriteInt32(buf[offset:], 33, int32(x.GetField33()))
 	return offset
 }
 
@@ -782,10 +782,10 @@ func (x *Message) fastWriteField34(buf []byte) (offset int) {
 	if len(x.Field34) == 0 {
 		return offset
 	}
-	offset += fastpb.WriteListPacked(buf[offset:], 34, len(x.Field34),
+	offset += fastpb.WriteListPacked(buf[offset:], 34, len(x.GetField34()),
 		func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 			offset := 0
-			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.Field34[numIdxOrVal]))
+			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.GetField34()[numIdxOrVal]))
 			return offset
 		})
 	return offset
@@ -795,7 +795,7 @@ func (x *Message) fastWriteField35(buf []byte) (offset int) {
 	if x.Field35 == nil {
 		return offset
 	}
-	for k, v := range x.Field35 {
+	for k, v := range x.GetField35() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 35,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -811,7 +811,7 @@ func (x *Message) fastWriteField36(buf []byte) (offset int) {
 	if x.Field36 == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 36, int32(x.Field36))
+	offset += fastpb.WriteInt32(buf[offset:], 36, int32(x.GetField36()))
 	return offset
 }
 
@@ -819,10 +819,10 @@ func (x *Message) fastWriteField37(buf []byte) (offset int) {
 	if len(x.Field37) == 0 {
 		return offset
 	}
-	offset += fastpb.WriteListPacked(buf[offset:], 37, len(x.Field37),
+	offset += fastpb.WriteListPacked(buf[offset:], 37, len(x.GetField37()),
 		func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 			offset := 0
-			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.Field37[numIdxOrVal]))
+			offset += fastpb.WriteInt32(buf[offset:], numTagOrKey, int32(x.GetField37()[numIdxOrVal]))
 			return offset
 		})
 	return offset
@@ -832,7 +832,7 @@ func (x *Message) fastWriteField38(buf []byte) (offset int) {
 	if x.Field38 == nil {
 		return offset
 	}
-	for k, v := range x.Field38 {
+	for k, v := range x.GetField38() {
 		offset += fastpb.WriteMapEntry(buf[offset:], 38,
 			func(buf []byte, numTagOrKey, numIdxOrVal int32) int {
 				offset := 0
@@ -872,7 +872,7 @@ func (x *Message) fastWriteField50(buf []byte) (offset int) {
 	if x.Field50 == nil {
 		return offset
 	}
-	offset += fastpb.WriteMessage(buf[offset:], 50, x.Field50)
+	offset += fastpb.WriteMessage(buf[offset:], 50, x.GetField50())
 	return offset
 }
 
@@ -906,7 +906,7 @@ func (x *Message_Condition) fastWriteField4(buf []byte) (offset int) {
 	if !x.Field4 {
 		return offset
 	}
-	offset += fastpb.WriteBool(buf[offset:], 4, x.Field4)
+	offset += fastpb.WriteBool(buf[offset:], 4, x.GetField4())
 	return offset
 }
 
@@ -922,8 +922,8 @@ func (x *Message_ConditionTree) fastWriteField2(buf []byte) (offset int) {
 	if x.Field2 == nil {
 		return offset
 	}
-	for i := range x.Field2 {
-		offset += fastpb.WriteMessage(buf[offset:], 2, x.Field2[i])
+	for i := range x.GetField2() {
+		offset += fastpb.WriteMessage(buf[offset:], 2, x.GetField2()[i])
 	}
 	return offset
 }
@@ -969,7 +969,7 @@ func (x *Message) sizeField1() (n int) {
 	if x.Field1 == 0 {
 		return n
 	}
-	n += fastpb.SizeDouble(1, x.Field1)
+	n += fastpb.SizeDouble(1, x.GetField1())
 	return n
 }
 
@@ -977,7 +977,7 @@ func (x *Message) sizeField2() (n int) {
 	if x.Field2 == 0 {
 		return n
 	}
-	n += fastpb.SizeFloat(2, x.Field2)
+	n += fastpb.SizeFloat(2, x.GetField2())
 	return n
 }
 
@@ -985,7 +985,7 @@ func (x *Message) sizeField3() (n int) {
 	if x.Field3 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(3, x.Field3)
+	n += fastpb.SizeInt32(3, x.GetField3())
 	return n
 }
 
@@ -993,7 +993,7 @@ func (x *Message) sizeField4() (n int) {
 	if x.Field4 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt64(4, x.Field4)
+	n += fastpb.SizeInt64(4, x.GetField4())
 	return n
 }
 
@@ -1001,7 +1001,7 @@ func (x *Message) sizeField5() (n int) {
 	if x.Field5 == 0 {
 		return n
 	}
-	n += fastpb.SizeUint32(5, x.Field5)
+	n += fastpb.SizeUint32(5, x.GetField5())
 	return n
 }
 
@@ -1009,7 +1009,7 @@ func (x *Message) sizeField6() (n int) {
 	if x.Field6 == 0 {
 		return n
 	}
-	n += fastpb.SizeUint64(6, x.Field6)
+	n += fastpb.SizeUint64(6, x.GetField6())
 	return n
 }
 
@@ -1017,7 +1017,7 @@ func (x *Message) sizeField7() (n int) {
 	if x.Field7 == 0 {
 		return n
 	}
-	n += fastpb.SizeSint32(7, x.Field7)
+	n += fastpb.SizeSint32(7, x.GetField7())
 	return n
 }
 
@@ -1025,7 +1025,7 @@ func (x *Message) sizeField8() (n int) {
 	if x.Field8 == 0 {
 		return n
 	}
-	n += fastpb.SizeSint64(8, x.Field8)
+	n += fastpb.SizeSint64(8, x.GetField8())
 	return n
 }
 
@@ -1033,7 +1033,7 @@ func (x *Message) sizeField9() (n int) {
 	if x.Field9 == 0 {
 		return n
 	}
-	n += fastpb.SizeFixed32(9, x.Field9)
+	n += fastpb.SizeFixed32(9, x.GetField9())
 	return n
 }
 
@@ -1041,7 +1041,7 @@ func (x *Message) sizeField10() (n int) {
 	if x.Field10 == 0 {
 		return n
 	}
-	n += fastpb.SizeFixed64(10, x.Field10)
+	n += fastpb.SizeFixed64(10, x.GetField10())
 	return n
 }
 
@@ -1049,7 +1049,7 @@ func (x *Message) sizeField11() (n int) {
 	if x.Field11 == 0 {
 		return n
 	}
-	n += fastpb.SizeSfixed32(11, x.Field11)
+	n += fastpb.SizeSfixed32(11, x.GetField11())
 	return n
 }
 
@@ -1057,7 +1057,7 @@ func (x *Message) sizeField12() (n int) {
 	if x.Field12 == 0 {
 		return n
 	}
-	n += fastpb.SizeSfixed64(12, x.Field12)
+	n += fastpb.SizeSfixed64(12, x.GetField12())
 	return n
 }
 
@@ -1065,7 +1065,7 @@ func (x *Message) sizeField13() (n int) {
 	if !x.Field13 {
 		return n
 	}
-	n += fastpb.SizeBool(13, x.Field13)
+	n += fastpb.SizeBool(13, x.GetField13())
 	return n
 }
 
@@ -1073,7 +1073,7 @@ func (x *Message) sizeField14() (n int) {
 	if x.Field14 == "" {
 		return n
 	}
-	n += fastpb.SizeString(14, x.Field14)
+	n += fastpb.SizeString(14, x.GetField14())
 	return n
 }
 
@@ -1081,7 +1081,7 @@ func (x *Message) sizeField15() (n int) {
 	if len(x.Field15) == 0 {
 		return n
 	}
-	n += fastpb.SizeBytes(15, x.Field15)
+	n += fastpb.SizeBytes(15, x.GetField15())
 	return n
 }
 
@@ -1089,7 +1089,7 @@ func (x *Message) sizeField16() (n int) {
 	if x.Field16 == nil {
 		return n
 	}
-	n += fastpb.SizeMessage(16, x.Field16)
+	n += fastpb.SizeMessage(16, x.GetField16())
 	return n
 }
 
@@ -1097,8 +1097,8 @@ func (x *Message) sizeField20() (n int) {
 	if len(x.Field20) == 0 {
 		return n
 	}
-	for i := range x.Field20 {
-		n += fastpb.SizeString(20, x.Field20[i])
+	for i := range x.GetField20() {
+		n += fastpb.SizeString(20, x.GetField20()[i])
 	}
 	return n
 }
@@ -1107,8 +1107,8 @@ func (x *Message) sizeField21() (n int) {
 	if x.Field21 == nil {
 		return n
 	}
-	for i := range x.Field21 {
-		n += fastpb.SizeMessage(21, x.Field21[i])
+	for i := range x.GetField21() {
+		n += fastpb.SizeMessage(21, x.GetField21()[i])
 	}
 	return n
 }
@@ -1117,7 +1117,7 @@ func (x *Message) sizeField22() (n int) {
 	if x.Field22 == nil {
 		return n
 	}
-	for k, v := range x.Field22 {
+	for k, v := range x.GetField22() {
 		n += fastpb.SizeMapEntry(22,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -1133,7 +1133,7 @@ func (x *Message) sizeField23() (n int) {
 	if x.Field23 == nil {
 		return n
 	}
-	for k, v := range x.Field23 {
+	for k, v := range x.GetField23() {
 		n += fastpb.SizeMapEntry(23,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -1149,7 +1149,7 @@ func (x *Message) sizeField33() (n int) {
 	if x.Field33 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(33, int32(x.Field33))
+	n += fastpb.SizeInt32(33, int32(x.GetField33()))
 	return n
 }
 
@@ -1157,10 +1157,10 @@ func (x *Message) sizeField34() (n int) {
 	if len(x.Field34) == 0 {
 		return n
 	}
-	n += fastpb.SizeListPacked(34, len(x.Field34),
+	n += fastpb.SizeListPacked(34, len(x.GetField34()),
 		func(numTagOrKey, numIdxOrVal int32) int {
 			n := 0
-			n += fastpb.SizeInt32(numTagOrKey, int32(x.Field34[numIdxOrVal]))
+			n += fastpb.SizeInt32(numTagOrKey, int32(x.GetField34()[numIdxOrVal]))
 			return n
 		})
 	return n
@@ -1170,7 +1170,7 @@ func (x *Message) sizeField35() (n int) {
 	if x.Field35 == nil {
 		return n
 	}
-	for k, v := range x.Field35 {
+	for k, v := range x.GetField35() {
 		n += fastpb.SizeMapEntry(35,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -1186,7 +1186,7 @@ func (x *Message) sizeField36() (n int) {
 	if x.Field36 == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(36, int32(x.Field36))
+	n += fastpb.SizeInt32(36, int32(x.GetField36()))
 	return n
 }
 
@@ -1194,10 +1194,10 @@ func (x *Message) sizeField37() (n int) {
 	if len(x.Field37) == 0 {
 		return n
 	}
-	n += fastpb.SizeListPacked(37, len(x.Field37),
+	n += fastpb.SizeListPacked(37, len(x.GetField37()),
 		func(numTagOrKey, numIdxOrVal int32) int {
 			n := 0
-			n += fastpb.SizeInt32(numTagOrKey, int32(x.Field37[numIdxOrVal]))
+			n += fastpb.SizeInt32(numTagOrKey, int32(x.GetField37()[numIdxOrVal]))
 			return n
 		})
 	return n
@@ -1207,7 +1207,7 @@ func (x *Message) sizeField38() (n int) {
 	if x.Field38 == nil {
 		return n
 	}
-	for k, v := range x.Field38 {
+	for k, v := range x.GetField38() {
 		n += fastpb.SizeMapEntry(38,
 			func(numTagOrKey, numIdxOrVal int32) int {
 				n := 0
@@ -1247,7 +1247,7 @@ func (x *Message) sizeField50() (n int) {
 	if x.Field50 == nil {
 		return n
 	}
-	n += fastpb.SizeMessage(50, x.Field50)
+	n += fastpb.SizeMessage(50, x.GetField50())
 	return n
 }
 
@@ -1281,7 +1281,7 @@ func (x *Message_Condition) sizeField4() (n int) {
 	if !x.Field4 {
 		return n
 	}
-	n += fastpb.SizeBool(4, x.Field4)
+	n += fastpb.SizeBool(4, x.GetField4())
 	return n
 }
 
@@ -1297,8 +1297,8 @@ func (x *Message_ConditionTree) sizeField2() (n int) {
 	if x.Field2 == nil {
 		return n
 	}
-	for i := range x.Field2 {
-		n += fastpb.SizeMessage(2, x.Field2[i])
+	for i := range x.GetField2() {
+		n += fastpb.SizeMessage(2, x.GetField2()[i])
 	}
 	return n
 }
diff --git a/examples/fastpb_gen/nested/nested.pb.go b/examples/fastpb_gen/nested/nested.pb.go
index 91c25f4..03ae5b5 100644
--- a/examples/fastpb_gen/nested/nested.pb.go
+++ b/examples/fastpb_gen/nested/nested.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
+// 	protoc-gen-go v1.28.0
 // 	protoc        v3.21.12
 // source: nested.proto
 
diff --git a/examples/fastpb_gen/pet/pet.pb.fast.go b/examples/fastpb_gen/pet/pet.pb.fast.go
index 5d775f4..c6d1d15 100644
--- a/examples/fastpb_gen/pet/pet.pb.fast.go
+++ b/examples/fastpb_gen/pet/pet.pb.fast.go
@@ -88,7 +88,7 @@ func (x *Pet) fastWriteField1(buf []byte) (offset int) {
 	if x.Name == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 1, x.Name)
+	offset += fastpb.WriteString(buf[offset:], 1, x.GetName())
 	return offset
 }
 
@@ -96,7 +96,7 @@ func (x *Pet) fastWriteField2(buf []byte) (offset int) {
 	if x.Age == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 2, x.Age)
+	offset += fastpb.WriteInt32(buf[offset:], 2, x.GetAge())
 	return offset
 }
 
@@ -104,7 +104,7 @@ func (x *Pet) fastWriteField3(buf []byte) (offset int) {
 	if x.Owner == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 3, x.Owner)
+	offset += fastpb.WriteString(buf[offset:], 3, x.GetOwner())
 	return offset
 }
 
@@ -112,7 +112,7 @@ func (x *Pet) fastWriteField4(buf []byte) (offset int) {
 	if x.Group == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 4, int32(x.Group))
+	offset += fastpb.WriteInt32(buf[offset:], 4, int32(x.GetGroup()))
 	return offset
 }
 
@@ -131,7 +131,7 @@ func (x *Pet) sizeField1() (n int) {
 	if x.Name == "" {
 		return n
 	}
-	n += fastpb.SizeString(1, x.Name)
+	n += fastpb.SizeString(1, x.GetName())
 	return n
 }
 
@@ -139,7 +139,7 @@ func (x *Pet) sizeField2() (n int) {
 	if x.Age == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(2, x.Age)
+	n += fastpb.SizeInt32(2, x.GetAge())
 	return n
 }
 
@@ -147,7 +147,7 @@ func (x *Pet) sizeField3() (n int) {
 	if x.Owner == "" {
 		return n
 	}
-	n += fastpb.SizeString(3, x.Owner)
+	n += fastpb.SizeString(3, x.GetOwner())
 	return n
 }
 
@@ -155,7 +155,7 @@ func (x *Pet) sizeField4() (n int) {
 	if x.Group == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(4, int32(x.Group))
+	n += fastpb.SizeInt32(4, int32(x.GetGroup()))
 	return n
 }
 
diff --git a/examples/fastpb_gen/pet/pet.pb.go b/examples/fastpb_gen/pet/pet.pb.go
index bd55bf4..dc57da4 100644
--- a/examples/fastpb_gen/pet/pet.pb.go
+++ b/examples/fastpb_gen/pet/pet.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.0
-// 	protoc        v3.21.1
+// 	protoc        v3.21.12
 // source: pet/pet.proto
 
 package pet
diff --git a/examples/fastpb_gen/user/player/player.pb.fast.go b/examples/fastpb_gen/user/player/player.pb.fast.go
new file mode 100644
index 0000000..73da21c
--- /dev/null
+++ b/examples/fastpb_gen/user/player/player.pb.fast.go
@@ -0,0 +1,195 @@
+// Code generated by Fastpb v0.0.2. DO NOT EDIT.
+
+package playercustom
+
+import (
+	fmt "fmt"
+	fastpb "github.com/cloudwego/fastpb"
+)
+
+var (
+	_ = fmt.Errorf
+	_ = fastpb.Skip
+)
+
+func (x *Player) FastRead(buf []byte, _type int8, number int32) (offset int, err error) {
+	switch number {
+	case 1:
+		offset, err = x.fastReadField1(buf, _type)
+		if err != nil {
+			goto ReadFieldError
+		}
+	case 2:
+		offset, err = x.fastReadField2(buf, _type)
+		if err != nil {
+			goto ReadFieldError
+		}
+	case 3:
+		offset, err = x.fastReadField3(buf, _type)
+		if err != nil {
+			goto ReadFieldError
+		}
+	case 4:
+		offset, err = x.fastReadField4(buf, _type)
+		if err != nil {
+			goto ReadFieldError
+		}
+	case 5:
+		offset, err = x.fastReadField5(buf, _type)
+		if err != nil {
+			goto ReadFieldError
+		}
+	default:
+		offset, err = fastpb.Skip(buf, _type, number)
+		if err != nil {
+			goto SkipFieldError
+		}
+	}
+	return offset, nil
+SkipFieldError:
+	return offset, fmt.Errorf("%T cannot parse invalid wire-format data, error: %s", x, err)
+ReadFieldError:
+	return offset, fmt.Errorf("%T read field %d '%s' error: %s", x, number, fieldIDToName_Player[number], err)
+}
+
+func (x *Player) fastReadField1(buf []byte, _type int8) (offset int, err error) {
+	x.Id, offset, err = fastpb.ReadInt32(buf, _type)
+	return offset, err
+}
+
+func (x *Player) fastReadField2(buf []byte, _type int8) (offset int, err error) {
+	x.Name, offset, err = fastpb.ReadString(buf, _type)
+	return offset, err
+}
+
+func (x *Player) fastReadField3(buf []byte, _type int8) (offset int, err error) {
+	var v int32
+	v, offset, err = fastpb.ReadInt32(buf, _type)
+	if err != nil {
+		return offset, err
+	}
+	x.Kind = PlayerKind(v)
+	return offset, nil
+}
+
+func (x *Player) fastReadField4(buf []byte, _type int8) (offset int, err error) {
+	x.Level, offset, err = fastpb.ReadInt32(buf, _type)
+	return offset, err
+}
+
+func (x *Player) fastReadField5(buf []byte, _type int8) (offset int, err error) {
+	x.Exp, offset, err = fastpb.ReadInt32(buf, _type)
+	return offset, err
+}
+
+func (x *Player) FastWrite(buf []byte) (offset int) {
+	if x == nil {
+		return offset
+	}
+	offset += x.fastWriteField1(buf[offset:])
+	offset += x.fastWriteField2(buf[offset:])
+	offset += x.fastWriteField3(buf[offset:])
+	offset += x.fastWriteField4(buf[offset:])
+	offset += x.fastWriteField5(buf[offset:])
+	return offset
+}
+
+func (x *Player) fastWriteField1(buf []byte) (offset int) {
+	if x.Id == 0 {
+		return offset
+	}
+	offset += fastpb.WriteInt32(buf[offset:], 1, x.GetId())
+	return offset
+}
+
+func (x *Player) fastWriteField2(buf []byte) (offset int) {
+	if x.Name == "" {
+		return offset
+	}
+	offset += fastpb.WriteString(buf[offset:], 2, x.GetName())
+	return offset
+}
+
+func (x *Player) fastWriteField3(buf []byte) (offset int) {
+	if x.Kind == 0 {
+		return offset
+	}
+	offset += fastpb.WriteInt32(buf[offset:], 3, int32(x.GetKind()))
+	return offset
+}
+
+func (x *Player) fastWriteField4(buf []byte) (offset int) {
+	if x.Level == 0 {
+		return offset
+	}
+	offset += fastpb.WriteInt32(buf[offset:], 4, x.GetLevel())
+	return offset
+}
+
+func (x *Player) fastWriteField5(buf []byte) (offset int) {
+	if x.Exp == 0 {
+		return offset
+	}
+	offset += fastpb.WriteInt32(buf[offset:], 5, x.GetExp())
+	return offset
+}
+
+func (x *Player) Size() (n int) {
+	if x == nil {
+		return n
+	}
+	n += x.sizeField1()
+	n += x.sizeField2()
+	n += x.sizeField3()
+	n += x.sizeField4()
+	n += x.sizeField5()
+	return n
+}
+
+func (x *Player) sizeField1() (n int) {
+	if x.Id == 0 {
+		return n
+	}
+	n += fastpb.SizeInt32(1, x.GetId())
+	return n
+}
+
+func (x *Player) sizeField2() (n int) {
+	if x.Name == "" {
+		return n
+	}
+	n += fastpb.SizeString(2, x.GetName())
+	return n
+}
+
+func (x *Player) sizeField3() (n int) {
+	if x.Kind == 0 {
+		return n
+	}
+	n += fastpb.SizeInt32(3, int32(x.GetKind()))
+	return n
+}
+
+func (x *Player) sizeField4() (n int) {
+	if x.Level == 0 {
+		return n
+	}
+	n += fastpb.SizeInt32(4, x.GetLevel())
+	return n
+}
+
+func (x *Player) sizeField5() (n int) {
+	if x.Exp == 0 {
+		return n
+	}
+	n += fastpb.SizeInt32(5, x.GetExp())
+	return n
+}
+
+var fieldIDToName_Player = map[int32]string{
+	1: "Id",
+	2: "Name",
+	3: "Kind",
+	4: "Level",
+	5: "Exp",
+}
diff --git a/examples/fastpb_gen/user/player/player.pb.go b/examples/fastpb_gen/user/player/player.pb.go
new file mode 100644
index 0000000..dee5d9b
--- /dev/null
+++ b/examples/fastpb_gen/user/player/player.pb.go
@@ -0,0 +1,240 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.0
+// 	protoc        v3.21.12
+// source: user/player/player.proto
+
+package playercustom
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type PlayerKind int32
+
+const (
+	PlayerKind_STRENGTH     PlayerKind = 0
+	PlayerKind_AGILITY      PlayerKind = 1
+	PlayerKind_INTELLECTUAL PlayerKind = 2
+)
+
+// Enum value maps for PlayerKind.
+var (
+	PlayerKind_name = map[int32]string{
+		0: "STRENGTH",
+		1: "AGILITY",
+		2: "INTELLECTUAL",
+	}
+	PlayerKind_value = map[string]int32{
+		"STRENGTH":     0,
+		"AGILITY":      1,
+		"INTELLECTUAL": 2,
+	}
+)
+
+func (x PlayerKind) Enum() *PlayerKind {
+	p := new(PlayerKind)
+	*p = x
+	return p
+}
+
+func (x PlayerKind) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (PlayerKind) Descriptor() protoreflect.EnumDescriptor {
+	return file_user_player_player_proto_enumTypes[0].Descriptor()
+}
+
+func (PlayerKind) Type() protoreflect.EnumType {
+	return &file_user_player_player_proto_enumTypes[0]
+}
+
+func (x PlayerKind) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use PlayerKind.Descriptor instead.
+func (PlayerKind) EnumDescriptor() ([]byte, []int) {
+	return file_user_player_player_proto_rawDescGZIP(), []int{0}
+}
+
+type Player struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id    int32      `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
+	Name  string     `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
+	Kind  PlayerKind `protobuf:"varint,3,opt,name=kind,proto3,enum=player.PlayerKind" json:"kind,omitempty"`
+	Level int32      `protobuf:"varint,4,opt,name=level,proto3" json:"level,omitempty"`
+	Exp   int32      `protobuf:"varint,5,opt,name=exp,proto3" json:"exp,omitempty"`
+}
+
+func (x *Player) Reset() {
+	*x = Player{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_user_player_player_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Player) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Player) ProtoMessage() {}
+
+func (x *Player) ProtoReflect() protoreflect.Message {
+	mi := &file_user_player_player_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Player.ProtoReflect.Descriptor instead.
+func (*Player) Descriptor() ([]byte, []int) {
+	return file_user_player_player_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Player) GetId() int32 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+func (x *Player) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *Player) GetKind() PlayerKind {
+	if x != nil {
+		return x.Kind
+	}
+	return PlayerKind_STRENGTH
+}
+
+func (x *Player) GetLevel() int32 {
+	if x != nil {
+		return x.Level
+	}
+	return 0
+}
+
+func (x *Player) GetExp() int32 {
+	if x != nil {
+		return x.Exp
+	}
+	return 0
+}
+
+var File_user_player_player_proto protoreflect.FileDescriptor
+
+var file_user_player_player_proto_rawDesc = []byte{
+	0x0a, 0x18, 0x75, 0x73, 0x65, 0x72, 0x2f, 0x70, 0x6c, 0x61, 0x79, 0x65, 0x72, 0x2f, 0x70, 0x6c,
+	0x61, 0x79, 0x65, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x06, 0x70, 0x6c, 0x61, 0x79,
+	0x65, 0x72, 0x22, 0x7c, 0x0a, 0x06, 0x50, 0x6c, 0x61, 0x79, 0x65, 0x72, 0x12, 0x0e, 0x0a, 0x02,
+	0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x02, 0x69, 0x64, 0x12, 0x12, 0x0a, 0x04,
+	0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65,
+	0x12, 0x26, 0x0a, 0x04, 0x6b, 0x69, 0x6e, 0x64, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x12,
+	0x2e, 0x70, 0x6c, 0x61, 0x79, 0x65, 0x72, 0x2e, 0x50, 0x6c, 0x61, 0x79, 0x65, 0x72, 0x4b, 0x69,
+	0x6e, 0x64, 0x52, 0x04, 0x6b, 0x69, 0x6e, 0x64, 0x12, 0x14, 0x0a, 0x05, 0x6c, 0x65, 0x76, 0x65,
+	0x6c, 0x18, 0x04, 0x20, 0x01, 0x28, 0x05, 0x52, 0x05, 0x6c, 0x65, 0x76, 0x65, 0x6c, 0x12, 0x10,
+	0x0a, 0x03, 0x65, 0x78, 0x70, 0x18, 0x05, 0x20, 0x01, 0x28, 0x05, 0x52, 0x03, 0x65, 0x78, 0x70,
+	0x2a, 0x39, 0x0a, 0x0a, 0x50, 0x6c, 0x61, 0x79, 0x65, 0x72, 0x4b, 0x69, 0x6e, 0x64, 0x12, 0x0c,
+	0x0a, 0x08, 0x53, 0x54, 0x52, 0x45, 0x4e, 0x47, 0x54, 0x48, 0x10, 0x00, 0x12, 0x0b, 0x0a, 0x07,
+	0x41, 0x47, 0x49, 0x4c, 0x49, 0x54, 0x59, 0x10, 0x01, 0x12, 0x10, 0x0a, 0x0c, 0x49, 0x4e, 0x54,
+	0x45, 0x4c, 0x4c, 0x45, 0x43, 0x54, 0x55, 0x41, 0x4c, 0x10, 0x02, 0x42, 0x4a, 0x5a, 0x48, 0x67,
+	0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x63, 0x6c, 0x6f, 0x75, 0x64, 0x77,
+	0x65, 0x67, 0x6f, 0x2f, 0x66, 0x61, 0x73, 0x74, 0x70, 0x62, 0x2f, 0x65, 0x78, 0x61, 0x6d, 0x70,
+	0x6c, 0x65, 0x73, 0x2f, 0x66, 0x61, 0x73, 0x74, 0x70, 0x62, 0x5f, 0x67, 0x65, 0x6e, 0x2f, 0x75,
+	0x73, 0x65, 0x72, 0x2f, 0x70, 0x6c, 0x61, 0x79, 0x65, 0x72, 0x3b, 0x70, 0x6c, 0x61, 0x79, 0x65,
+	0x72, 0x63, 0x75, 0x73, 0x74, 0x6f, 0x6d, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_user_player_player_proto_rawDescOnce sync.Once
+	file_user_player_player_proto_rawDescData = file_user_player_player_proto_rawDesc
+)
+
+func file_user_player_player_proto_rawDescGZIP() []byte {
+	file_user_player_player_proto_rawDescOnce.Do(func() {
+		file_user_player_player_proto_rawDescData = protoimpl.X.CompressGZIP(file_user_player_player_proto_rawDescData)
+	})
+	return file_user_player_player_proto_rawDescData
+}
+
+var file_user_player_player_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_user_player_player_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_user_player_player_proto_goTypes = []interface{}{
+	(PlayerKind)(0), // 0: player.PlayerKind
+	(*Player)(nil),  // 1: player.Player
+}
+var file_user_player_player_proto_depIdxs = []int32{
+	0, // 0: player.Player.kind:type_name -> player.PlayerKind
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_user_player_player_proto_init() }
+func file_user_player_player_proto_init() {
+	if File_user_player_player_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_user_player_player_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Player); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_user_player_player_proto_rawDesc,
+			NumEnums:      1,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_user_player_player_proto_goTypes,
+		DependencyIndexes: file_user_player_player_proto_depIdxs,
+		EnumInfos:         file_user_player_player_proto_enumTypes,
+		MessageInfos:      file_user_player_player_proto_msgTypes,
+	}.Build()
+	File_user_player_player_proto = out.File
+	file_user_player_player_proto_rawDesc = nil
+	file_user_player_player_proto_goTypes = nil
+	file_user_player_player_proto_depIdxs = nil
+}
diff --git a/examples/fastpb_gen/user/user.pb.fast.go b/examples/fastpb_gen/user/user.pb.fast.go
index b391262..0fce45d 100644
--- a/examples/fastpb_gen/user/user.pb.fast.go
+++ b/examples/fastpb_gen/user/user.pb.fast.go
@@ -60,7 +60,7 @@ func (x *User) fastWriteField1(buf []byte) (offset int) {
 	if x.Id == 0 {
 		return offset
 	}
-	offset += fastpb.WriteInt32(buf[offset:], 1, x.Id)
+	offset += fastpb.WriteInt32(buf[offset:], 1, x.GetId())
 	return offset
 }
 
@@ -68,7 +68,7 @@ func (x *User) fastWriteField2(buf []byte) (offset int) {
 	if x.Name == "" {
 		return offset
 	}
-	offset += fastpb.WriteString(buf[offset:], 2, x.Name)
+	offset += fastpb.WriteString(buf[offset:], 2, x.GetName())
 	return offset
 }
 
@@ -85,7 +85,7 @@ func (x *User) sizeField1() (n int) {
 	if x.Id == 0 {
 		return n
 	}
-	n += fastpb.SizeInt32(1, x.Id)
+	n += fastpb.SizeInt32(1, x.GetId())
 	return n
 }
 
@@ -93,7 +93,7 @@ func (x *User) sizeField2() (n int) {
 	if x.Name == "" {
 		return n
 	}
-	n += fastpb.SizeString(2, x.Name)
+	n += fastpb.SizeString(2, x.GetName())
 	return n
 }
 
diff --git a/examples/fastpb_gen/user/user.pb.go b/examples/fastpb_gen/user/user.pb.go
index a7f3821..3e20ab0 100644
--- a/examples/fastpb_gen/user/user.pb.go
+++ b/examples/fastpb_gen/user/user.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.28.0
-// 	protoc        v3.21.1
+// 	protoc        v3.21.12
 // source: user/user.proto
 
 package user
diff --git a/examples/gen_code.bat b/examples/gen_code.bat
index d42ff8e..afabcd8 100644
--- a/examples/gen_code.bat
+++ b/examples/gen_code.bat
@@ -1,4 +1,7 @@
 
 
 protoc --go_opt=paths=source_relative --go_out=./fastpb_gen --fastpb_opt=paths=source_relative --fastpb_out=./fastpb_gen -I ./idl/ user/user.proto
-protoc --go_opt=paths=source_relative --go_out=./fastpb_gen --fastpb_opt=paths=source_relative --fastpb_out=./fastpb_gen -I ./idl/ pet/pet.proto
\ No newline at end of file
+protoc --go_opt=paths=source_relative --go_out=./fastpb_gen --fastpb_opt=paths=source_relative --fastpb_out=./fastpb_gen -I ./idl/ pet/pet.proto
+
+protoc --go_opt=paths=source_relative --go_out=./fastpb_gen --fastpb_opt=paths=source_relative --fastpb_out=./fastpb_gen -I ./idl/ user/player/player.proto
+protoc --go_opt=paths=source_relative --go_out=./fastpb_gen --fastpb_opt=paths=source_relative --fastpb_out=./fastpb_gen -I ./idl/ mount/mount.proto
\ No newline at end of file
diff --git a/examples/gen_code.sh b/examples/gen_code.sh
index ba8f86d..a199a41 100755
--- a/examples/gen_code.sh
+++ b/examples/gen_code.sh
@@ -33,3 +33,6 @@ protoc --go_opt=paths=source_relative --go_out=./fastpb_gen/nested --fastpb_opt=
 
 protoc --go_opt=paths=source_relative --go_out=./fastpb_gen --fastpb_opt=paths=source_relative --fastpb_out=./fastpb_gen -I ./idl/ user/user.proto
 protoc --go_opt=paths=source_relative --go_out=./fastpb_gen --fastpb_opt=paths=source_relative --fastpb_out=./fastpb_gen -I ./idl/ pet/pet.proto
+
+protoc --go_opt=paths=source_relative --go_out=./fastpb_gen --fastpb_opt=paths=source_relative --fastpb_out=./fastpb_gen -I ./idl/ user/player/player.proto
+protoc --go_opt=paths=source_relative --go_out=./fastpb_gen --fastpb_opt=paths=source_relative --fastpb_out=./fastpb_gen -I ./idl/ mount/mount.proto
diff --git a/examples/idl/mount/mount.proto b/examples/idl/mount/mount.proto
new file mode 100644
index 0000000..8955121
--- /dev/null
+++ b/examples/idl/mount/mount.proto
@@ -0,0 +1,10 @@
+syntax = "proto3";
+package mount;
+option go_package = "github.com/cloudwego/fastpb/examples/fastpb_gen/mount;mount";
+
+import "user/player/player.proto";
+message Mount {
+	string name = 1;
+	string owner = 3;
+	player.PlayerKind kind = 4;
+}
\ No newline at end of file
diff --git a/examples/idl/user/player/player.proto b/examples/idl/user/player/player.proto
new file mode 100644
index 0000000..4b7e610
--- /dev/null
+++ b/examples/idl/user/player/player.proto
@@ -0,0 +1,17 @@
+syntax = "proto3";
+package player;
+option go_package = "github.com/cloudwego/fastpb/examples/fastpb_gen/user/player;playercustom";
+
+message Player {
+	int32 id = 1;
+	string name = 2;
+	PlayerKind kind = 3;
+	int32 level = 4;
+	int32 exp = 5;
+}
+
+enum PlayerKind  {
+	STRENGTH = 0;
+	AGILITY = 1;
+	INTELLECTUAL = 2;
+}
\ No newline at end of file
diff --git a/protoc-gen-fastpb/generator/generator.go b/protoc-gen-fastpb/generator/generator.go
index 365d269..2040e71 100644
--- a/protoc-gen-fastpb/generator/generator.go
+++ b/protoc-gen-fastpb/generator/generator.go
@@ -161,12 +161,24 @@ func (fg *fastgen) newFieldBody(f *protogen.Field, desc protoreflect.FieldDescri
 		// *struct
 		b := &bodyMessage{}
 		// FIXME: Any is unsupported.
-		b.TypeName = "*" + parseTypeName(desc.Message(), fg.f.Proto)
+		typeName := parseTypeName(desc.Message(), fg.f.Proto)
+		names := strings.Split(typeName, ";")
+		if len(names) > 1 {
+			b.TypeName = "*" + names[0] + filepath.Ext(names[1])
+		} else {
+			b.TypeName = "*" + typeName
+		}
 		return b
 	case protoreflect.EnumKind:
 		// Enum
 		b := &bodyEnum{}
-		b.TypeName = parseTypeName(desc.Enum(), fg.f.Proto)
+		typeName := parseTypeName(desc.Enum(), fg.f.Proto)
+		names := strings.Split(typeName, ";")
+		if len(names) > 1 {
+			b.TypeName = names[0] + filepath.Ext(names[1])
+		} else {
+			b.TypeName = typeName
+		}
 		b.IsOptional = isPointer
 		return b
 	default: