diff --git a/README.md b/README.md
index b21ce80a7..9fb23ff76 100644
--- a/README.md
+++ b/README.md
@@ -17,9 +17,10 @@ SkyWalking: Large-Scale Distributed Systems Tracing Infrastructure, also known D
 # Abstract
 * An open source Large-Scale Distributed Systems Tracing Infrastructure, also known a ditributed tracer.
 * Based on [Google Dapper Paper: Dapper, a Large-Scale Distributed Systems Tracing Infrastructure](http://research.google.com/pubs/pub36356.html), [read Simplified Chinese Version](http://duanple.blog.163.com/blog/static/70971767201329113141336/)
-* Support popular rpc frameworks, such as [dubbo](https://github.com/alibaba/dubbo), [dubbox](https://github.com/dangdangdotcom/dubbox), [motan](https://github.com/weibocom/motan) etc., trigger email-alert when application occurs unexpected exception。
+* Support popular rpc frameworks, such as [dubbo](https://github.com/alibaba/dubbo), [dubbox](https://github.com/dangdangdotcom/dubbox), [motan](https://github.com/weibocom/motan) etc., trigger email-alert when application occurs unexpected exception.
+* Auto-instrumentation mechenism, **no need to CHANGE any application source code**.
 * Easy to deploy, **even in product mode** (since 2.0) . No need of Hadoop, HBase, or Cassandra Cluster.
-* Pure Java server implements. provide gRPC (since 2.0)  and HTTP (since 2.1) cross-platform spans collecting service.
+* Pure Java server implementation. provide gRPC (since 2.0)  and HTTP (since 2.1) cross-platform spans collecting service.
 
 
 # Supported components