The photo taken on May 25 show clear water and blue sky seen in Changsha City. In recent years, Changsha has been vigorously promoting green development and ecological civilization. The city recorded 71.8% of days with good air quality in 2017, an increase of 17.8% over that in 2013. The standard-reaching ration of the water quality for centralized drinking water sources, the water quality good performance ration of Changsha Section of the Xiangjiang River, and the standard-reaching ration of the water quality of river boundary sections all have reached 100%. (Photo/Tong Di)