The first flight of the Xi'an-Istanbul direct air route arrives at Xi'an Xianyang International Airport in Xi'an, capital of northwest China's Shaanxi Province, Dec. 30, 2019. Three round trips operated by Turkish Airlines are expected to be made between Xi'an and Istanbul, with inbound flights on every Monday, Wednesday and Friday, and outbound ones on every Tuesday, Thursday and Saturday. (Xinhua/Shao Rui)