README.md in pm25-0.0.3 vs README.md in pm25-0.0.4

@@ -1,20 +1,23 @@
 # PM25
 
+[![Gem Version](https://badge.fury.io/rb/pm25.png)](http://badge.fury.io/rb/pm25)
 [![Build Status](https://www.travis-ci.org/ekohe/pm25.png?branch=master)](https://www.travis-ci.org/ekohe/pm25)
 [![Code Climate](https://codeclimate.com/github/ekohe/pm25.png)](https://codeclimate.com/github/ekohe/pm25)
+[![Dependency Status](https://gemnasium.com/ekohe/pm25.png)](https://gemnasium.com/ekohe/pm25)
+[![Coverage Status](https://coveralls.io/repos/ekohe/pm25/badge.png)](https://coveralls.io/r/ekohe/pm25)
 
-PM2.5 and ozone readings Data From U.S. Consulate.
+China PM2.5 and ozone readings Data From U.S. Consulate. Include below cities of China:
 
-Include below cities of China:
-
 - Beijing
 - Shanghai
 - Chengdu
 - Guangzhou
 - Shenyang
 
+Another gem about Air Quality Index of China available here [ChinaAqi][china_aqi], all monitoring stations in most cities of China are available, most AQI data are available, all the data is form China's official sector. Check it out!
+
 ## Installation
 
 Add this line to your application's Gemfile:
 
     gem 'pm25'
@@ -101,5 +104,7 @@
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)
 4. Push to the branch (`git push origin my-new-feature`)
 5. Create new Pull Request
+
+[china_aqi]: https://github.com/Xuhao/china_aqi