In pics: Qingshan'guan Pass of Great Wall in north China's Hebei

Aerial photo taken on April 23, 2019 shows the Qingshan'guan Pass of the Great Wall in Qianxi County of north China's Hebei Province. The Qingshan'guan Pass of the Great Wall was built along the lush mountain ranges in Qianxi County. (Xinhua/Yang Shiyao)