Passengers board a direct flight from Xi'an to London at the Xi'an Xianyang International Airport in Xianyang City, northwest China's Shaanxi Province, May 7, 2018. A direct air route opened Monday between Xi'an, capital of northwest China's Shaanxi Province, and London, capital of the UK. Tianjin Airlines will operate the air service every Monday and Friday using an Airbus A330. The flight is the 7th direct air route linking Xi'an with Europe. (Xinhua/Shao Rui)