KUNMING, June 4, 2016 (Xinhua) -- Staff workers prepare to clear up green algae at the Dianchi Lake in Kunming, southwest China's Yunnan Province, May 29, 2016. The water quality in the Dianchi Lake has been improved as a series of pollution control works, including construction of sewage treatment facilities and wetlands along the lake, were carried out. This year, a total of 88 water environment treatment projects for Dianchi Lake will be started. (Xinhua/Lin Yiguang)