Technicians take part in the cold-running test at a section of Shanghai Metro Line 18 in East China's Shanghai, April 26, 2021. The cold-running test of the first phase of the northern section of Shanghai Metro Line 18, from Yuqiao to South Changjiang Road, began on April 26, and will be followed by a series of tests, including power transmission and hot-running tests. It is expected to open to trial operation by the end of 2021, by which time the total mileage of Shanghai Metro will reach 809 kilometers. [Photo/Xinhua]
Technicians take part in the cold-running test at a section of Shanghai Metro Line 18 in East China's Shanghai, April 26, 2021. [Photo/Xinhua]
Technicians take part in the cold-running test at a section of Shanghai Metro Line 18 in East China's Shanghai, April 26, 2021. [Photo/Xinhua]
Technicians take part in the cold-running test at a section of Shanghai Metro Line 18 in East China's Shanghai, April 26, 2021. [Photo/Xinhua]
Technicians take part in the cold-running test at a section of Shanghai Metro Line 18 in East China's Shanghai, April 26, 2021. [Photo/Xinhua]
