Binxian Tunnel under construction in Binzhou City, NW China's Shaanxi

Photo taken on Dec. 28, 2019 shows the construction site of the Binxian Tunnel in Binzhou City, northwest China's Shaanxi Province. The 14.251-kilometer Binxian Tunnel of the Yinchuan-Xi'an high-speed railway, was drilled through Saturday. (Xinhua/Zhang Bowen)