Aerial photo taken on July 18, 2020 shows a woman walking in the Nakao River wetland park in Nanning, south China's Guangxi Zhuang Autonomous Region. The Nakao River, which used to be a sewage ditch in Nanning, has turned into a beautiful wetland park, thanks to the ecological and environmental improvement by local government in recently years. (Xinhua/Zhou Hua)
