diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..fcf8ac1
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "cgal"]
+	path = cgal
+	url = https://gitee.com/atari/cgal.git
+	branch = 5.6.x-branch
diff --git a/cgal b/cgal
new file mode 160000
index 0000000..11fc194
--- /dev/null
+++ b/cgal
@@ -0,0 +1 @@
+Subproject commit 11fc1943fbc75135d3ec5776cebab1f4aaa43fb6