A crew member carries a bottle of hot water to melt the ice of a frozen floor drain on train K7039 from Harbin to Mohe in northeast China's Heilongjiang Province, Jan. 7, 2021. Train K7039, connecting Harbin, capital of Heilongjiang, and Mohe, China's northernmost city in Heilongjiang, runs a distance of 1,223 kilometers during the over 16-hour trip. Many passengers visit Mohe in winter to experience the extreme cold weather. The outside temperature drops to about minus 40 degrees Celsius while inside the train it remains over 20 degrees Celsius. (Xinhua/Xie Jianfei)
