Workers lay railway tracks in Chaoyang City, northeast China's Liaoning Province, Nov. 30, 2020. With a length of 105.6 kilometers and a designed speed of 350 kilometers per hour, the Chaoyang-Linghai railway is an important part of the high-speed railway network in northeast China. (Xinhua/Yang Qing)

A worker drives a tractor to lay railway tracks of Chaoyang-Linghai railway in Chaoyang City, northeast China's Liaoning Province, Nov. 30, 2020. With a length of 105.6 kilometers and a designed speed of 350 kilometers per hour, the Chaoyang-Linghai railway is an important part of the high-speed railway network in northeast China. (Xinhua/Yang Qing)

Workers prepare to lay the last pair of railway tracks of Chaoyang-Linghai railway in Chaoyang City, northeast China's Liaoning Province, Nov. 30, 2020. With a length of 105.6 kilometers and a designed speed of 350 kilometers per hour, the Chaoyang-Linghai railway is an important part of the high-speed railway network in northeast China. (Xinhua/Yang Qing)