Connecting China's capital Beijing and Zhangjiakou of north China's Hebei Province, the 174-km-long railway, is expected to be completed and put into use in 2019, when the trip between the two cities will be cut from more than 3 hours to just 50 minutes.

Workers start to lay the tracks for the Beijing-Zhangjiakou high-speed railway line at Huailai section in north China's Hebei Province, Nov. 1, 2018. (Photos: Xinhua)