Update README.md

@@ -3,11 +3,23 @@ Simple RTMP Server
 
 SRS(2013-2016) is closed, thanks~
 
+## Open Forks
+
 The following is some forks, order by the number of sub forks:
 
 1. [https://github.com/smartdu/srs](https://github.com/smartdu/srs)
 1. [https://github.com/mbeacom/srs](https://github.com/mbeacom/srs)
 1. [https://github.com/wenjiegit/srs](https://github.com/wenjiegit/srs)
 
+## Closed Forks
+
+Please DONOT fork these repository, for it's CLOSED also(不要fork这些分支，也属于关闭状态):
+
+1. [https://github.com/ossrs/srs](https://github.com/ossrs/srs)
+1. [https://github.com/winlinvip/simple-rtmp-server](https://github.com/winlinvip/simple-rtmp-server)
+1. [https://code.csdn.net/winlinvip/srs-csdn](https://code.csdn.net/winlinvip/srs-csdn)
+1. [http://git.oschina.net/winlinvip/srs.oschina](http://git.oschina.net/winlinvip/srs.oschina)
+1. [https://gitlab.com/winlinvip/srs-gitlab](https://gitlab.com/winlinvip/srs-gitlab)
+
 Winlin