KUNMING, July 13, 2016 -- A park staff works at the Dounan wetland park bordering the Dianchi Lake on the outskirts of Kunming, capital of southwest China's Yunnan Province, July 12, 2016. The local government has intensified efforts to improve the water quality through preventing pollution and other environment protection measures. More than 20 wetland parks have been built around the Dianchi Lake. (Xinhua/Chen Haining)