Qin Mountains
Over much of its length, the Xi'an–Chengdu Passenger Dedicated Line largely parallels existing railways: the Yangpingguan–Ankang railway in southwestern Shaanxi (between Hanzhong and the Yangpingguan junction), and the Baoji–Chengdu railway in Sichuan (from Yangpingguan to Chengdu). However, the section from Xi'an to Hanzhong, crossing in tunnels under the Qin Mountains, follows an entirely new direct route.