diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -5,16 +5,19 @@ Sky Walking
 
 SkyWalking: Large-Scale Distributed Systems Tracing Infrastructure, also known Distributed Tracer。
 
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 # 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), [Simplified Chines](http://duanple.blog.163.com/blog/static/70971767201329113141336/)
 * Supports popular rpc frameworks, such as [dubbo](https://github.com/alibaba/dubbo), [dubbox](https://github.com/dangdangdotcom/dubbox), [motan](https://github.com/weibocom/motan) etc., supports email-alert when application occurs unexpected exception。
 * Execution time of creating span than 100μs.
-* Easy to deploy, **even in product mode** ( since 2.x ) . No need of Hadoop, HBase, or Cassandra Cluster.
+* 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.
+
 
 # Supported components
 * web container