1. National Development and Reform Commission, National Energy Administrationhttp://www.chinapower.com.cn
2. CPC Central Committee and the State Councilhttp://www.cec.org.cn
3. Polaris Smart Grid Onlinehttp://news.bjx.com.cn
4. Polaris Smart Grid Onlinehttp://news.bjx.com.cn/html/20100126/241904.shtml