China Air Quality 全国空气质量

The China Air Quality widget shows the real-Time Air Quality Index (AQI) for more than 300 cities in Mainland China, Hong Kong and Taiwan.

The Air Quality data sources varies depending on the cities:

- The US Embassy PM2.5 data is used for Shanghai, Beijing, Chengdu, Shenyang and Guangzhou.

- The China Ministry Environment Pollution Departement PM10 data is used for all other cities in China.

- For Hong Kong and Taiwan, the respective Environment agencies PM2.5 data is used.

The overall AQI, PM2.5 and PM10 measurements are updated every hour.

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In order to install the widget, you need to insert it on the homescreen:

- If you are using Android 4.0 (Ice Cream sandwich), select the "All Apps" icon (usually on the top-right corner), then the widget tab, and click on the "Beijing Air" widget.

- If you are using any other version below 4.0, you need to long-press in an empty area on the default home screen and select "Widgets", and then "Beijing Air".

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For more information, you can consult the website aqicn.org.