The photo shows the Danjiangkou Reservoir. Located on the Hanjiang River, a tributary of the Yangtze River, and spanning both Henan and Hubei provinces, the Danjiangkou Reservoir is the water source of the central route of the South-to-North Water Diversion Project, a multi-decade infrastructure mega project designed to divert water from China's humid south to dry north. [Photo/China.org.cn]