diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..417097d
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "coco"]
+	path = coco
+	url = https://github.com/xfy911/coco.git
diff --git a/coco b/coco
new file mode 160000
index 0000000..8b42e98
--- /dev/null
+++ b/coco
@@ -0,0 +1 @@
+Subproject commit 8b42e984efd55f5c18fdf2d249d1aba0ca4e70eb