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

File photo taken on June 20, 2017 shows technicians monitoring data on a high-speed train during a joint test of Xi'an-Chengdu Passenger Railway in northwest China's Shaanxi Province. The 643-km line 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)