Photo taken with a drone shows workers joining together two parts of an arch bridge across the Liangji Canal at a construction site of the Qufu-Heze section on the Rizhao-Lankao high-speed railway in east China's Shandong Province, Sept. 19, 2020. (Xinhua/Guo Xulei)

Workers join together two parts of an arch bridge across the Liangji Canal at a construction site of the Qufu-Heze section on the Rizhao-Lankao high-speed railway in east China's Shandong Province, Sept. 19, 2020. (Xinhua/Guo Xulei)

Photo taken with a drone shows workers joining together two parts of an arch bridge across the Liangji Canal at a construction site of the Qufu-Heze section on the Rizhao-Lankao high-speed railway in east China's Shandong Province, Sept. 19, 2020. (Xinhua/Guo Xulei)

Workers join together two parts of an arch bridge across the Liangji Canal at a construction site of the Qufu-Heze section on the Rizhao-Lankao high-speed railway in east China's Shandong Province, Sept. 19, 2020. (Xinhua/Guo Xulei)

Workers join together two parts of an arch bridge across the Liangji Canal at a construction site of the Qufu-Heze section on the Rizhao-Lankao high-speed railway in east China's Shandong Province, Sept. 19, 2020. (Xinhua/Guo Xulei)