diff --git a/README.md b/README.md
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[](https://codecov.io/gh/ossrs/srs/branch/4.0release)
[](https://github.com/ossrs/srs/wiki/v1_CN_Contact#wechat)
-SRS/4.0,[Leo][release4],是一个流媒体集群,支持RTMP/HLS/WebRTC/SRT/GB28181,高效、稳定、易用,简单而快乐。
-SRS is a RTMP/HLS/WebRTC/SRT/GB28181 streaming cluster, high efficiency, stable and simple.
+SRS/4.0,[Leo][release4],是一个简单高效的实时视频服务器,支持RTMP/WebRTC/HLS/HTTP-FLV/SRT/GB28181/RTSP。
+SRS is a simple, high efficiency and realtime video server, supports RTMP/WebRTC/HLS/HTTP-FLV/SRT/GB28181/RTSP.
> Remark: Although SRS is licenced under [MIT][LICENSE], but there are some depended libraries which are distributed using their own licenses, please read [License Mixing][LicenseMixing].