Working staff greet passengers at a subway station in Harbin, capital of northeast China's Heilongjiang Province, Sept. 26, 2013. China's first underground subway line in a frigid region on Thursday started a trial run in Harbin. The 17.48-km line with 18 stations has been designed to withstand extreme winter cold in the city, which has a record low temperature of 38.1 degrees Celsius below zero. (Xinhua/Wang Song) |