Aerial photo taken on Aug. 25, 2020 shows the fields of a crab cultivation base at Madeng Town of Xichuan County in Nanyang, central China's Henan Province. As part of the water source of the middle route of China's south-to-north water diversion project, Xichuan County has made much progress in both ecological protection and poverty alleviation. (Xinhua/Feng Dapeng)