Update README_zh_CN.md

README_zh_CN.md

-Dolphin Scheduler
+Dolphin Scheduler Official Website
+[dolphinscheduler.apache.org](https://dolphinscheduler.apache.org)
 ============
 [![License](https://img.shields.io/badge/license-Apache%202-4EB1BA.svg)](https://www.apache.org/licenses/LICENSE-2.0.html)
 [![Total Lines](https://tokei.rs/b1/github/apache/Incubator-DolphinScheduler?category=lines)](https://github.com/apache/Incubator-DolphinScheduler)
@@ -88,7 +89,7 @@ Dolphin Scheduler使用了很多优秀的开源项目，比如google的guava、g
 
 ### 获得帮助
 1. Submit an issue
-1. Mail list: dev@dolphinscheduler.apache.org. Mail to dev-subscribe@dolphinscheduler.apache.org, follow the reply to subscribe the mail list.
+1. Mail to dev-subscribe@dolphinscheduler.apache.org, follow the reply to subscribe the mail list. then you can send mail to dev@dolphinscheduler.apache.org.
 1. Contact WeChat group manager, ID 510570367. This is for Mandarin(CN) discussion.
 
 ### 版权