Beijing-Zhangjiakou high-speed railway under construction in N China's Hebei

The 9077-meter Guanting Reservoir bridge, part of the Beijing-Zhangjiakou high-speed railway, is under construction in Huailai County, north China's Hebei Province, Nov. 9, 2017. The Beijing-Zhangjiakou high-speed railway, a major transportation project for the 2022 Winter Olympic Games, is expected to be finished by the end of 2019. (Xinhua/Yang Shiyao)