Workers are seen at the construction site of a bridge over Chengde-Tangshan highway, a key project of Hebei section of Beijing-Shenyang high-speed railway, in north China's Hebei Province, Nov. 1, 2017. With a designed speed of 350 km per hour, the railway is expected to slash travel time between Beijing and Shenyang to 2.5 hours. (Xinhua/Chen Yehua)