diff --git a/README.md b/README.md
index 6e4cacb..6f84180 100644
--- a/README.md
+++ b/README.md
@@ -963,7 +963,14 @@ If you want to get a more detailed configuration and explanation of the KCP para
 ```
 
 ### TODO  
-- Welcome joining group feedback...
+- HTTP, socks proxy which has multi parents proxy load balancing?
+- HTTP (s) proxy support PAC?
+- Welcome joining group feedback...   
+
+### How to contribute to the code?  
+First, you need to clone the project to your account, and then modify the code on the dev branch.   
+Finally, Pull Request to dev branch of goproxy project, and contribute code for efficiency.   
+PR needs to explain what changes have been made and why you change them.  
 
 ### How to use the source code?    
 Recommend go1.8.5, which does not guarantee that version >=1.9 can be used.   
diff --git a/sdk/android-ios/release_android.sh b/sdk/android-ios/release_android.sh
index b78ebe3..9906fd3 100755
--- a/sdk/android-ios/release_android.sh
+++ b/sdk/android-ios/release_android.sh
@@ -4,7 +4,16 @@ rm -rf sdk-android-*.tar.gz
 rm -rf android
 mkdir android
 
-#android
+#android ; jdk,android ndk & android sdk required, install gomobile go1.10 required
+#export GOPATH="$HOME/go"
+#export GOROOT="/usr/local/go"
+#export PATH="$GOROOT/bin:$GOPATH/bin:$PATH"
+#export ANDROID_HOME="$HOME/Android/Sdk"
+#export NDK_ROOT="$HOME/Android/Sdk/ndk-bundle"
+#export PATH="$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools:$NDK_ROOT:$PATH"
+#go get -v golang.org/x/mobile/cmd/gomobile
+#gomobile init
+
 gomobile bind -v -target=android -javapkg=snail007 -ldflags="-s -w"
 mv proxy.aar android/snail007.goproxy.sdk.aar
 mv proxy-sources.jar android/snail007.goproxy.sdk-sources.jar
diff --git a/services/sps.go b/services/sps.go
index be3ff5a..5defff6 100644
--- a/services/sps.go
+++ b/services/sps.go
@@ -368,7 +368,7 @@ func (s *SPS) OutToTCP(inConn *net.Conn) (err error) {
 	if c, ok := s.userConns.Get(inAddr); ok {
 		(*c.(*net.Conn)).Close()
 	}
-	s.userConns.Set(inAddr, &inConn)
+	s.userConns.Set(inAddr, inConn)
 	return
 }
 func (s *SPS) InitBasicAuth() (err error) {
diff --git a/services/tcp.go b/services/tcp.go
index 79240a8..52d436c 100644
--- a/services/tcp.go
+++ b/services/tcp.go
@@ -148,7 +148,7 @@ func (s *TCP) OutToTCP(inConn *net.Conn) (err error) {
 	if c, ok := s.userConns.Get(inAddr); ok {
 		(*c.(*net.Conn)).Close()
 	}
-	s.userConns.Set(inAddr, &inConn)
+	s.userConns.Set(inAddr, inConn)
 	return
 }
 func (s *TCP) OutToUDP(inConn *net.Conn) (err error) {