A construction worker pictured at the construction site of the Datong-Zhangjiakou high-speed railway in Tianzhen county, Shanxi province, June 19. The 140-kilometer railway, connecting Datong in Shanxi province and Zhangjiakou in Hebei province, is designed for trains traveling at speeds of up to 250 kilometers per hour. [Photo/Xinhua]

The Datong-Zhangjiakou high-speed railway is under construction in Tianzhen county, Shanxi province, June 19. Starting in November 2015, the railway is expected to be completed and put into use by the end of 2019. Once finished, the railway will connect several major high-speed railways such as the Beijing-Zhangjiakou, Zhangjiakou-Hohhot and Datong-Xi’an railways. [Photo/Xinhua]