Bridge maintenance workers work under the arch of the Beipanjiang railway bridge in southwest China's Guizhou Province, Jan. 26, 2018. The high-speed railway bridge, 721 meters in length, is a part of the Shanghai-Kunming high-speed railway line, which links the country's prosperous eastern coast with the less-developed southwest. Maintenance workers examine the bridge everyday to make sure the safety of the railway line. (Xinhua/Liu Xu)