A face changing performer of Sichuan Opera poses with a stewardess on Xi'an-Chengdu high-speed train, Dec. 6, 2017. The high-speed rail line linking northwest China's Xi'an and southwest China's Chengdu, went into operation Wednesday, slashing the travel time between the two cities from about 11 hours to just 4. The 658-km new line is China's first rail route running through the Qinling Mountains. (Photo: China News Service/Liu Zhongjun)