diff --git a/README.md b/README.md
index 15e70d1..5aebf5b 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ third-party: libuvpp, libuv-java JNI code by Oracle.
   
   notes: to run node-android API from Rhino JS engine, add libs/js.jar in build path manually
 
-  for Android studio user, refer to https://github.com/InstantWebP2P/node-android/tree/android_studio
+  for Android studio user, refer to [Master branch](https://github.com/InstantWebP2P/node-android/tree/master)
 
 ### Features
 
@@ -32,8 +32,8 @@ third-party: libuvpp, libuv-java JNI code by Oracle.
 * DNS
 * URL
 * IPv6
-* for API usage, check https://github.com/InstantWebP2P/node-android/tree/master/src/com/iwebpp/node/tests
-* WebSocket/WebSocketServer supported, check https://github.com/InstantWebP2P/node-android/tree/master/src/com/iwebpp/wspp/tests
+* for API usage, check [API usages](https://github.com/InstantWebP2P/node-android/tree/master/src/com/iwebpp/node/tests)
+* WebSocket/WebSocketServer supported, check [Unit tests](https://github.com/InstantWebP2P/node-android/tree/master/src/com/iwebpp/wspp/tests)
 * Connect middleware
 * Crypto: NACL support, public box,secret box,signature/verify
 * SecureWebSocket over NACL
@@ -55,7 +55,7 @@ third-party: libuvpp, libuv-java JNI code by Oracle.
 * Implement 'public String content()' in 'MyScript' to return user script
 * Execute JS engine in a separate Java Thread with 'MyScript.execute()'
 * When authoring script, please use NodeCurrentContext(alias NCC) in node-android API
-* For details, check https://github.com/InstantWebP2P/node-android/tree/master/src/com/iwebpp/node/js/tests
+* For details, check [Unit Tests](https://github.com/InstantWebP2P/node-android/tree/master/src/com/iwebpp/node/js/tests)
 
 
 ### TODO