A pilot of China's Chengdu Airlines salutes medical workers leaving for Hubei Province at Chengdu Shuangliu International Airport in Chengdu, southwest China's Sichuan Province, Feb. 21, 2020. Chengdu Airlines' four China's domestically-developed ARJ21 aircrafts and one Airbus plane with 231 health workers and medical supplies flied to Hubei on Friday to help fight against the novel coronavirus. (Xinhua/Liu Kun)
