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

Workers work at the construction site of Yangjiayan Super Bridge of Xi'an-Chengdu Passenger Railway in Mianyang, southwest China's Sichuan Province, Aug. 3, 2016. 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)