Passengers take the No 1 subway line in Harbin, capital of Northeast China's Heilongjiang province, Sept 26, 2013. China's first subway line in a frigid region started a trial run in Harbin on Thursday. The line is 17.48-km long and able to withstand extreme cold in the city, which has a record low temperature of 38.1 C below zero. [Photo/Xinhua] |