Photo 1:People take cable cars over Dianchi Lake in Kunming, southwest China's Yunnan Province, Nov. 14, 2017. The water quality of Dianchi Lake has been improved a lot after years of water ecosystem restoration and wastewater management. (Xinhua/Lin Yiguang)Photo 2:Photos taken on Nov. 14, 2017 show the scenery of wetland by the Dianchi Lake in Kunming, southwest China's Yunnan Province. The water quality of Dianchi Lake has been improved a lot after years of water ecosystem restoration and wastewater management. (Xinhua/Lin Yiguang)
Photo 3:Workers collect waste from a river that flows into Dianchi Lake in Kunming, southwest China's Yunnan Province, Sept. 12, 2017. The water quality of Dianchi Lake has been improved a lot after years of water ecosystem restoration and wastewater management. (Xinhua/Lin Yiguang)