Aerial photo taken on March 21 shows the Hebei section of the Datong-Zhangjiakou high-speed railway constructed by China Railway 22nd Bureau Group Corporation. 

The Daliangshan tunnel of the Datong-Zhangjiakou high-speed railway was cut through on March 21. As an important supporting project of the 2022 Winter Olympics in Beijing, the Datong-Zhangjiakou high-speed railway is expected to begin service before the end of this year.

The high-speed railway will reduce travel time between Datong, Shanxi province and Beijing to around 100 minutes from the current 6 hours.