Passengers use mobile payment to take subway in NW China's Shaanxi

Passengers use mobile payment to take subway at the Dayanta Station of Xi'an, capital of northwest China's Shaanxi Province, Jan. 1, 2017. Passengers of Xi'an can take the subway by using the "Xi'an Subway" app or scanning the QR code of Alipay since Monday. (Xinhua/Liu Xiao)