diff --git a/README.md b/README.md
index 0b91a334..4cbb7f4a 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
   <img src=./docs/images/title.png >
 </div>
 
+hello world
+
 # CS 自学指南
 
 > *Everyone should enjoy CS if you have a good teacher to teach you a good course.*