
Photo taken on April 17, 2017 shows the construction site of Xuanhua section of Beijing-Zhangjiakou high-speed railway in north China. (Xinhua/Yang Shiyao)
Photo taken on April 17, 2017 shows the construction site of Xuanhua section of Beijing-Zhangjiakou high-speed railway in north China. (Xinhua/Yang Shiyao)