diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..876fcf30
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,9 @@
+[submodule "HelloGitHub"]
+	path = HelloGitHub
+	url = https://github.com/521xueweihan/HelloGitHub
+[submodule "smokeandkill@github.com"]
+	path = smokeandkill@github.com
+	url = https://smokeandkill@github.com/
+[submodule "Co"]
+	path = Co
+	url = https://smokeandkill@github.com/
diff --git a/HelloGitHub b/HelloGitHub
new file mode 160000
index 00000000..a1c5cbd1
--- /dev/null
+++ b/HelloGitHub
@@ -0,0 +1 @@
+Subproject commit a1c5cbd1b7e07bdbf041a46a92120bd0618501a8