Aerial photo taken on Dec. 9, 2019 shows a part of the middle route of the south-to-north water diversion project in Xichuan County of Nanyang, central China's Henan Province. The middle route project has been carrying water through canals and pipes from the Danjiangkou Reservoir through Henan and Hebei provinces before reaching the cities of Beijing and Tianjin since the project started in December 2014. (Xinhua/Feng Dapeng)