diff --git a/README.md b/README.md
index 3ed11fd..2e550c9 100755
--- a/README.md
+++ b/README.md
@@ -64,6 +64,8 @@ Assume your UDP is blocked or being QOS-ed or just poorly supported. Assume your
 ```
 
 Now,an encrypted raw tunnel has been established between client and server through TCP port 4096. Connecting to UDP port 3333 at the client side is equivalent to connecting to port 7777 at the server side. No UDP traffic will be exposed.
+### Note
+to run on Android, see [Android_Guide](/doc/android_guide.md)
 
 # Advanced Topic
 ### Usage