diff --git a/README.md b/README.md
index 71ccf09..09b4e0c 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,13 @@
 
 Vitamio SDK for iOS
 
-[Quickly Start(zh)](https://github.com/yixia/Vitamio-iOS/blob/master/Doc/Vitamio_SDK_for_iOS_User_Manual_cn.md)
-[FAQ](https://github.com/yixia/Vitamio-iOS/blob/master/Doc/FAQ.md)
-[Change Log](https://github.com/yixia/Vitamio-iOS/blob/master/Vitamio/CHANGELOG.md)
+[Quickly Start(zh)][a1]  
+[FAQ][a2]  
+[Change Log][a3]  
+
+[a1]: https://github.com/yixia/Vitamio-iOS/blob/master/Doc/Vitamio_SDK_for_iOS_User_Manual_cn.md
+[a2]: https://github.com/yixia/Vitamio-iOS/blob/master/Doc/FAQ.md
+[a3]: https://github.com/yixia/Vitamio-iOS/blob/master/Vitamio/CHANGELOG.md
 
 
 # Directory detail