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

Workers lay rail tracks along the Sichuan segment of Xi'an-Chengdu Passenger Railway at a railway station in Jiangyou, southwest China's Sichuan Province, March 29, 2017. 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/Xue Yubin)