Workers are seen at the construction site of a grand bridge across Beijing-Tibet expressway, which is a section of the Beijing-Zhangjiakou high-speed railway line in Huailai County of Zhangjiakou, north China's Hebei Province, June 26, 2017. Beijing-Zhangjiakou high-speed railway, a major transportation project for the 2022 Olympic and Paralympic Winter Games, is expected to be finished by the end of 2019. The new railway will link Beijing's Yanqing district and Chongli county in Zhangjiakou. The new railway will boast a speed of 350 kilometers per hour, and will take less than one hour to travel from Beijing to Zhangjiakou. (Xinhua/Yang Shiyao)
