The Beijing-Zhangjiakou high-speed railway begins operation on Monday, reducing the travel time between Beijing and Zhangjiakou, the co-host city in Hebei Province of the 2022 Beijing Winter Olympics, from more than three hours to 47 minutes. The project promotes collaborative development in the Beijing-Tianjin-Hebei region and provides qualified transportation service for the Winter Olympics. Photos: Li Hao/GT