diff --git a/Buff/src/jvmMain/kotlin/com/lt/buff/options/FunctionFieldsInfo.kt b/Buff/src/jvmMain/kotlin/com/lt/buff/options/FunctionFieldsInfo.kt
index d6384cc..9951361 100644
--- a/Buff/src/jvmMain/kotlin/com/lt/buff/options/FunctionFieldsInfo.kt
+++ b/Buff/src/jvmMain/kotlin/com/lt/buff/options/FunctionFieldsInfo.kt
@@ -10,5 +10,11 @@ internal class FunctionFieldsInfo(
     val isInTheConstructor: Boolean,
     val isBuffBean: Boolean,
     val nullable: String,
-    val isList: Boolean = false,
-)
\ No newline at end of file
+    val isList: Boolean,
+    val typeString: String,
+) {
+    /**
+     * 获取addBuff或removeBuff的后缀,用于区分type是否可空
+     */
+    fun getBuffSuffix(): String = if (isList && typeString.endsWith("?>")) "WithNull" else ""
+}
\ No newline at end of file
diff --git a/Buff/src/jvmMain/kotlin/com/lt/buff/provider/BuffSymbolProcessor.kt b/Buff/src/jvmMain/kotlin/com/lt/buff/provider/BuffSymbolProcessor.kt
index 7c2a98c..ae0ff93 100644
--- a/Buff/src/jvmMain/kotlin/com/lt/buff/provider/BuffSymbolProcessor.kt
+++ b/Buff/src/jvmMain/kotlin/com/lt/buff/provider/BuffSymbolProcessor.kt
@@ -3,6 +3,7 @@ package com.lt.buff.provider
 import com.google.devtools.ksp.processing.Resolver
 import com.google.devtools.ksp.processing.SymbolProcessor
 import com.google.devtools.ksp.processing.SymbolProcessorEnvironment
+import com.google.devtools.ksp.symbol.ClassKind
 import com.google.devtools.ksp.symbol.KSAnnotated
 import com.google.devtools.ksp.symbol.KSClassDeclaration
 import com.google.devtools.ksp.validate
@@ -18,9 +19,8 @@ internal class BuffSymbolProcessor(private val environment: SymbolProcessorEnvir
     override fun process(resolver: Resolver): List<KSAnnotated> {
         val ret = mutableListOf<KSAnnotated>()
         resolver.getSymbolsWithAnnotation(Buff::class.qualifiedName!!)
-            .toList()
             .forEach {
-                if (it is KSClassDeclaration && it.classKind.type == "class") {
+                if (it is KSClassDeclaration && it.classKind == ClassKind.CLASS) {
                     if (!it.validate()) ret.add(it)
                     else it.accept(BuffVisitor(environment), Unit)//处理符号
                 }
@@ -28,4 +28,4 @@ internal class BuffSymbolProcessor(private val environment: SymbolProcessorEnvir
         //返回无法处理的符号
         return ret
     }
-}
\ No newline at end of file
+}
diff --git a/Buff/src/jvmMain/kotlin/com/lt/buff/provider/BuffVisitor.kt b/Buff/src/jvmMain/kotlin/com/lt/buff/provider/BuffVisitor.kt
index 47f9ceb..13d0f50 100644
--- a/Buff/src/jvmMain/kotlin/com/lt/buff/provider/BuffVisitor.kt
+++ b/Buff/src/jvmMain/kotlin/com/lt/buff/provider/BuffVisitor.kt
@@ -54,10 +54,19 @@ internal class BuffVisitor(private val environment: SymbolProcessorEnvironment)
         //遍历构造内的字段
         classDeclaration.primaryConstructor?.parameters?.forEach {
             val name = it.name?.getShortName() ?: ""
-            val (ksType, isBuffBean, typeName, nullable, finallyTypeName) = getKSTypeInfo(it.type, options)
+            val ksTypeInfo = getKSTypeInfo(it.type, options)
             //写入构造内的普通字段
-            file.appendText("    ${if (it.isVal) "val" else "var"} $name: $finallyTypeName,\n")
-            functionFields.add(FunctionFieldsInfo(name, true, isBuffBean, nullable))
+            file.appendText("    ${if (it.isVal) "val" else "var"} $name: ${ksTypeInfo.finallyTypeName},\n")
+            functionFields.add(
+                FunctionFieldsInfo(
+                    name,
+                    true,
+                    ksTypeInfo.isBuffBean,
+                    ksTypeInfo.nullable,
+                    ksTypeInfo.isList,
+                    ksTypeInfo.typeString,
+                )
+            )
         }
         //遍历所有字段
         classDeclaration.getAllProperties().forEach {
@@ -89,7 +98,16 @@ internal class BuffVisitor(private val environment: SymbolProcessorEnvironment)
                         "    val $fieldName: $typeName${info.typeString} = $stateFieldName\n"
                     )
                 }
-                functionFields.add(FunctionFieldsInfo(fieldName, false, isBuffBean, nullable, info.isList))
+                functionFields.add(
+                    FunctionFieldsInfo(
+                        fieldName,
+                        false,
+                        isBuffBean,
+                        nullable,
+                        info.isList,
+                        info.typeString,
+                    )
+                )
             }
         }
         file.appendText(") {\n")
@@ -103,24 +121,23 @@ internal class BuffVisitor(private val environment: SymbolProcessorEnvironment)
         file.appendText(
             "\n    fun removeBuff(): $fullName =\n" +
                     "        $fullName(${
-                        functionFields.filter { it.isInTheConstructor }
-                            .map {
-                                if (it.isBuffBean)
-                                    "${it.fieldName}${it.nullable}.removeBuff()"
-                                else
-                                    it.fieldName
-                            }
-                            .joinToString()
+                        functionFields.filter { it.isInTheConstructor }.joinToString {
+                            if (it.isBuffBean)
+                                "${it.fieldName}${it.nullable}.removeBuff${it.getBuffSuffix()}()"
+                            else
+                                it.fieldName
+                        }
                     }).also {\n"
         )
         functionFields.filter { !it.isInTheConstructor }.forEach {
-            val isList = if (it.isList) it.nullable + ".toList()" else ""
             file.appendText(
                 "            it.${it.fieldName} = ${
                     if (it.isBuffBean)
-                        "${it.fieldName}$isList${it.nullable}.removeBuff()"
+                        "${it.fieldName}${
+                            if (it.isList) "" else it.nullable
+                        }.removeBuff${it.getBuffSuffix()}()"
                     else
-                        it.fieldName + isList
+                        it.fieldName
                 }\n"
             )
         }
@@ -137,7 +154,7 @@ internal class BuffVisitor(private val environment: SymbolProcessorEnvironment)
                 file.appendText(
                     "        ${
                         if (it.isBuffBean)
-                            "${it.fieldName}${it.nullable}.addBuff()"
+                            "${it.fieldName}${it.nullable}.addBuff${it.getBuffSuffix()}()"
                         else
                             it.fieldName
                     },\n"
@@ -147,7 +164,7 @@ internal class BuffVisitor(private val environment: SymbolProcessorEnvironment)
                     file.appendText(
                         "        mutableStateOf(${
                             if (it.isBuffBean)
-                                "${it.fieldName}${it.nullable}.addBuff()"
+                                "${it.fieldName}${it.nullable}.addBuff${it.getBuffSuffix()}()"
                             else
                                 it.fieldName
                         }),\n"
@@ -156,7 +173,7 @@ internal class BuffVisitor(private val environment: SymbolProcessorEnvironment)
                     file.appendText(
                         "        ${
                             if (it.isBuffBean)
-                                "${it.fieldName}${it.nullable}.addBuff()"
+                                "${it.fieldName}${it.nullable}.addBuff${it.getBuffSuffix()}()"
                             else
                                 it.fieldName
                         }${it.nullable}.toMutableStateList() ?: mutableStateListOf(),\n"
@@ -167,13 +184,21 @@ internal class BuffVisitor(private val environment: SymbolProcessorEnvironment)
         file.appendText("    )\n\n${options.getCustomInFile(::getInfo)}")
         //写入Collection<addBuff>
         file.appendText(
-            "\n\nfun Collection<$fullName?>.addBuff() =\n" +
-                    "    map { it?.addBuff() } as List<$className>"
+            "\n\nfun Collection<$fullName?>.addBuffWithNull() =\n" +
+                    "    map { it?.addBuff() }"
+        )
+        file.appendText(
+            "\nfun Collection<$fullName>.addBuff() =\n" +
+                    "    map { it.addBuff() }"
         )
         //写入Collection<removeBuff>
         file.appendText(
-            "\n\nfun Collection<$className?>.removeBuff() =\n" +
-                    "    map { it?.removeBuff() } as List<$fullName>"
+            "\n\nfun Collection<$className?>.removeBuffWithNull() =\n" +
+                    "    map { it?.removeBuff() }"
+        )
+        file.appendText(
+            "\nfun Collection<$className>.removeBuff() =\n" +
+                    "    map { it.removeBuff() }"
         )
         file.close()
     }
diff --git a/README.md b/README.md
index 8cf884d..ab2386b 100644
--- a/README.md
+++ b/README.md
@@ -16,10 +16,6 @@
 
 1. Convert some fields in beans to MutableState&lt;T&gt; that can be used directly
 
-## Capability to be achieved
-
-<a href="https://github.com/ltttttttttttt/Buff/blob/main/README_CN.md">see this</a>
-
 ## How to use
 
 Step 1 and 2.add dependencies:
diff --git a/README_CN.md b/README_CN.md
index 576504e..9818b85 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -16,10 +16,6 @@
 
 1. 将beans中的某些字段转换为可以直接使用的MutableState&lt;T&gt;
 
-## 待实现功能
-
-1. 支持MutableList
-
 ## 使用方式
 
 Step 1和2.添加依赖:
@@ -47,7 +43,7 @@ dependencies {
 ```kotlin
 plugins {
     ...
-    id("com.google.devtools.ksp") version "1.8.20-1.0.10"//this,前面的1.7.10对应你的kotlin版本,更多版本参考: https://github.com/google/ksp/releases
+    id("com.google.devtools.ksp") version "1.8.20-1.0.10"//this,前面的1.8.20对应你的kotlin版本,更多版本参考: https://github.com/google/ksp/releases
 }
 
 ...
diff --git a/app/src/main/java/com/lt/buffapp/UseBuff.kt b/app/src/main/java/com/lt/buffapp/UseBuff.kt
index bbbfa52..a436902 100644
--- a/app/src/main/java/com/lt/buffapp/UseBuff.kt
+++ b/app/src/main/java/com/lt/buffapp/UseBuff.kt
@@ -38,12 +38,14 @@ class BuffBean(
     val id: Int? = null,
     var info2: InfoBean? = null,
     var infoList2: List<InfoBean>? = null,
+    var infoList4: List<InfoBean?>? = null,
 ) {
     var name: String? = null
     var info: InfoBean? = null
     var infoBean: InfoBean = InfoBean()
     var type: Type? = null
     var infoList: List<InfoBean?>? = null
+    var infoList3: List<InfoBean>? = null
     var list: List<String>? = null
     var infoListList: List<List<InfoBean>>? = null
     var map: Map<String, InfoBean>? = null
diff --git a/buildSrc/src/main/kotlin/Versions.kt b/buildSrc/src/main/kotlin/Versions.kt
index 915e9de..17b61f2 100644
--- a/buildSrc/src/main/kotlin/Versions.kt
+++ b/buildSrc/src/main/kotlin/Versions.kt
@@ -3,4 +3,4 @@ const val composeVersion = "1.4.0"//compose版本
 const val composeCompilerVersion = "1.4.5"//compose编译版本
 const val kspVersion = "$kotlinVersion-1.0.10"//ksp版本
 
-const val mVersion = "0.1.2"//此库的版本
\ No newline at end of file
+const val mVersion = "1.0.0"//此库的版本
\ No newline at end of file