Photo taken on Aug. 16, 2019 shows the waiting hall of the Wushan Airport in Chongqing, southwest China. The successful landing of China Express's flight G52685 on the Chongqing Wushan Airport marks the official operation of the airport. Nicknamed the "in the clouds" airport, the Chongqing Wushan Airport is located at an altitude of more than 1,770 meters above sea level, and sits about 15 km away from the center of Wushan County in Chongqing. (Xinhua/Liu Chan)