Aerial photo taken on July 31, 2018 shows the scenery of the Awancang Wetland in Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Chen Bin)
Photo taken on May 26, 2017 shows an aerial view of the Puzhehei state wetland park in Qiubei County, southwest China's Yunnan Province. (Xinhua/Hu Chao)
Tourists visit the Dajiuhu wetland in Shennongjia, central China's Hubei Province, May 18, 2018. (Xinhua/Du Huaju)
Cattle graze in Dajiuhu wetland in Shennongjia, central China's Hubei Province, May 18, 2018. (Xinhua/Du Huaju)
Photo taken on May 18, 2018 shows the scenery of Dajiuhu wetland in Shennongjia, central China's Hubei Province. (Xinhua/Du Huaju)
Aerial photo taken on May 17, 2018 shows the scenery of Aha wetland park in southwest China's Guizhou Province. (Xinhua/Qin Gang)
Aerial photo taken on May 17, 2018 shows the scenery of Aha wetland park in southwest China's Guizhou Province. (Xinhua/Qin Gang)
Photo taken on April 27, 2018 shows the scenery of Yani national wetland park in Nyingchi, southwest China's Tibet Autonomous Region. (Xinhua/Zhang Rufeng)
Photo taken on April 27, 2018 shows the scenery of Yani national wetland park in Nyingchi, southwest China's Tibet Autonomous Region. (Xinhua/Zhang Rufeng)
Aerial photo taken on April 3, 2018 shows the view of a wetland park in Fenkou Town of Chun'an County in Hangzhou, east China's Zhejiang Province. The wetland park which covers an area of over 33 hectares is the highlight project of environmental improvement in Fenkou Town. (Xinhua/Xu Yu)
Aerial photo taken on April 3, 2018 shows the view of a wetland park in Fenkou Town of Chun'an County in Hangzhou, east China's Zhejiang Province. The wetland park which covers an area of over 33 hectares is the highlight project of environmental improvement in Fenkou Town. (Xinhua/Xu Yu)
Photo taken on May 26, 2017 shows an aerial view of the Puzhehei state wetland park in Qiubei County, southwest China's Yunnan Province. (Xinhua/Hu Chao)
