Have a look at China's Xi'an-Chengdu Passenger Railway

Workers work at the construction site of Ningqiang South Railway Station in Ningqiang County, northwest China's Shaanxi Province, Feb. 28, 2017. The 643-km Xi'an-Chengdu Passenger Railway is China's first rail route to run through the Qinling Mountains. With a designed speed of 250 km per hour, it will slash the travel time between the two cities from the previous 16 hours. (Xinhua/Li Yibo)