Construction site of comprehensive underground pipe gallery for 2022 Winter Olympic Games

Workers are seen at the construction site of the comprehensive underground pipe gallery for the 2022 Winter Olympic Games in Yanqing District of Beijing, capital of China, Dec. 28, 2018. With a total length of 7.5 kilometers, the pipe gallery will provide water and power supply and telecommunication service for the Olympic Games. (Xinhua/Xing Guangli)