add note of native in README.md (#73)

diff --git a/README.md b/README.md
index 552b80a..09a8406 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,9 @@
 [![License](https://img.shields.io/badge/license-Apache%202-4EB1BA.svg)](https://www.apache.org/licenses/LICENSE-2.0.html)
 [![TravisCI](https://travis-ci.org/apache/rocketmq-client-go.svg)](https://travis-ci.org/apache/rocketmq-client-go)
 
-* The client is using cgo to call [rocketmq-client-cpp](https://github.com/apache/rocketmq-client-cpp), which has been proven robust and widely adopted within Alibaba Group by many business units for more than three years.
+( The alpha version of Apache RocketMQ Go in Pure Go has been released, Welcome have a try! [native version](https://github.com/apache/rocketmq-client-go/tree/native) )
 
+* The client is using cgo to call [rocketmq-client-cpp](https://github.com/apache/rocketmq-client-cpp), which has been proven robust and widely adopted within Alibaba Group by many business units for more than three years.
 
 ----------
 ## Features