An aerial photo taken on June 29, 2016 shows a part of Zhajiaba Wetland at the Changsha-Gongma National Nature Reserve in Shiqu County, southwest China's Sichuan Province. Experts have found various types of wetlands after 7-day investigation on wetlands in Shiqu County. Shiqu County, which is located on the southeastern part of the Qinghai-Tibet Plateau, covers an area of 1.1 million hectares of wetlands. These wetlands play a role in keeping ecological balance of the sources of the Yangtze River and the Yellow River. (Photo/Xinhua)
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