A staff member patrols on the platform of Zhangjiakou Highspeed Railway Station in Zhangjiakou, north China's Hebei province, Dec. 29, 2019. The high-speed railway line connecting Beijing and Zhangjiakou in north China's Hebei Province will go into service on Monday, China Railway Corporation said Saturday. The railway line is a major project for the 2022 Olympic and Paralympic Winter Games. It will reduce the travel time between Beijing and Zhangjiakou, the co-host city of the 2022 Olympics, from currently over three hours to 47 minutes. The railway is 174 km long, with a maximum design speed of 350 kph. (Xinhua/Mu Yu)