Photo story: Beijing witnesses great change in past five years

File photo taken on June 27, 2017 shows the construction site of Guanting Reservoir grand bridge, a section of the Beijing-Zhangjiakou high-speed railway line. Beijing witnesses a great change in the past five years and the city will keep focusing on the coordinated development in Beijing, Tianjin and Hebei regions and objective of removing non-capital functions. (Xinhua/Yang Shiyao)