Cleaning up upper reaches of Yangtze River

Aerial photo taken on March 17, 2018 shows the Yangtze River passing through Shigu Township of Lijiang City, southwest China's Yunnan Province. To keep Yangtze River clean and beautiful, efforts to restore ecological environment have been taken in the upper reaches of Yangtze River in Yunnan Province in recent years. (Xinhua/Lin Yiguang)