[ROCKETMQ-218] Polish README.md, closes apache#113

README.md

@@ -3,18 +3,25 @@
 [![GitHub release](https://img.shields.io/badge/release-download-orange.svg)](https://github.org/apache/rocketmqreleases)
 [![License](https://img.shields.io/badge/license-Apache%202-4EB1BA.svg)](https://www.apache.org/licenses/LICENSE-2.0.html)
 
-**[Apache RocketMQ](https://rocketmq.incubator.apache.org) is a low latency, reliable, scalable, easy to use message oriented middleware born from alibaba massive messaging business.**
+**[Apache RocketMQ](https://rocketmq.incubator.apache.org) is a distributed messaging and streaming platform with low latency, high performance and reliability, trillion-level capacity and flexible scalability.**
+
+It offers a variety of features:
+
+* Pub/Sub messaging model
+* Scheduled message delivery
+* Message retroactivity by time or offset
+* Log hub for streaming
+* Big data integration
+* Reliable FIFO and strict ordered messaging in the same queue
+* Efficient pull&push consumption model
+* Million-level message accumulation capacity in a single queue
+* Multiple messaging protocols like JMS and OpenMessaging
+* Flexible distributed scale-out deployment architecture
+* Lightning-fast batch message exchange system
+* Various message filter mechanics such as SQL and Tag
+* Docker images for isolated testing and cloud isolated clusters
+* Feature-rich administrative dashboard for configuration, metrics and monitoring
 
-It offers a variety of features as follows:
-
-* Pub/Sub and P2P messaging model
-* Reliable FIFO and strict sequential messaging in the same queue
-* Long pull queue model,also support push consumption style
-* Million message accumulation ability in single queue
-* Over a variety of messaging protocols.such as JMS,MQTT etc.
-* Distributed high available deploy architecture, meets at least once message delivery semantics
-* Docker images for isolated testing and cloud Isolated clusters
-* Feature-rich administrative dashboard for configuration,metrics and monitoring
 
 ----------
 
@@ -29,13 +36,12 @@ It offers a variety of features as follows:
 ----------
 
 ## Apache RocketMQ Community
-* [RocketMQ Community Incubator Projects](https://github.com/rocketmq)
 * [RocketMQ Community Projects](https://github.com/apache/incubator-rocketmq-externals)
 
 ----------
 
 ## Contributing
-We are always very happy to have contributions, whether for trivial cleanups,big new features or other material rewards. more details see [here](CONTRIBUTING.md) 
+We always welcome new contributions, whether for trivial cleanups, big new features or other material rewards. more details see [here](CONTRIBUTING.md) 
 
 ----------
 ## License