diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..e05081a
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "third_party/pay"]
+	path = third_party/pay
+	url = git@git.kingsome.cn:server/pay.git
diff --git a/third_party/pay b/third_party/pay
new file mode 160000
index 0000000..d4cc4b5
--- /dev/null
+++ b/third_party/pay
@@ -0,0 +1 @@
+Subproject commit d4cc4b5a95a2b2ba65534adbf68b74b469975232