Workers pile the welded rails at a base in Beijing, May 14, 2020. Track-laying work for the Beijing-Xiongan high-speed line is expected to be finished in the end of May, and tests will be carried out in September. By the end of the year, it will be ready for operations. [Photo by Zou Hong/chinadaily.com.cn]

A worker uses a rail welding machine to weld rails at a base in Beijing, May 14, 2020. [Photo by Zou Hong/chinadaily.com.cn]

Workers pile the welded rails at a base in Beijing, May 14, 2020. The 500-meter rails will be paved along the high-speed line connecting Beijing's Daxing International Airport and Xiongan Railway Station in Hebei province. [Photo by Zou Hong/chinadaily.com.cn]