diff --git a/.gitmodules b/.gitmodules
index e0b1dc2..4256a76 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "common/model"]
 	path = common/model
 	url = http://114.132.124.145:3000/liuxiaobo/modelx.git
+[submodule "common/pb"]
+	path = common/pb
+	url = http://114.132.124.145:3000/liuxiaobo/pb.git
diff --git a/common/pb b/common/pb
new file mode 160000
index 0000000..c600f86
--- /dev/null
+++ b/common/pb
@@ -0,0 +1 @@
+Subproject commit c600f86ae82410026c37d249b99076d9199b320c