diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..d3d7dc5
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "jianpu-ly"]
+	path = jianpu-ly
+	url = https://github.com/ssb22/jianpu-ly.git
diff --git a/jianpu-ly b/jianpu-ly
new file mode 160000
index 0000000..e662289
--- /dev/null
+++ b/jianpu-ly
@@ -0,0 +1 @@
+Subproject commit e6622893679740e7568b1007f1801dc995896616