Combo aerial photo taken on (top to bottom) Jan. 9, 2018, May 1, 2019, Aug. 13, 2019 and Aug. 27, 2019 respectively shows the construction site of Chengdu Tianfu International Airport in Jianyang, about 50 kilometers from downtown Chengdu, southwest China's Sichuan Province. The main structure of Terminal 2 of Chengdu Tianfu International Airport was capped on Wednesday. Chengdu Tianfu International Airport is expected to put into operation in 2021. (Xinhua/Jiang Hongjing)