Aerial photo taken on Dec. 6, 2016 shows the project of crossing the Yellow River in the central route of China's south-to-north water diversion project, central China's Henan Province. The central route of the project has supplied water to about 42 million people since December of 2014. A total of 6.09 billion cubic meters of water has been delivered to Beijing and Tianjin municipalities and the provinces of Hebei and Henan. (Photo/Xinhua)
