diff --git a/NOTES.md b/NOTES.md
index 99aa0ae..5484c9d 100644
--- a/NOTES.md
+++ b/NOTES.md
@@ -603,3 +603,8 @@ Consider the use of Bloom Filter and FM-sketches
 
 http://www.hprd.org/download/
 
+
+
+## GIT USAGE
+https://git-scm.com/book/zh/v1/%E8%B5%B7%E6%AD%A5-%E5%88%9D%E6%AC%A1%E8%BF%90%E8%A1%8C-Git-%E5%89%8D%E7%9A%84%E9%85%8D%E7%BD%AE
+