Photo taken on Nov. 25, 2017 shows the Mingyuexia walkway in Guangyuan City, southwest China's Sichuan Province. The Xi'an-Chengdu high-speed railway, China's first rail route to run through the Qinling Mountains, is scheduled to enter operation within the year. By then, several ancient cities and tourist attractions will be connected by the railway. (Xinhua/Zhang Cheng)