Firefighter Wu Junming plays the guitar in the activity room of the fire station in Beiji Village of Mohe City, northeast China's Heilongjiang Province, Jan. 13, 2021. Firefighters stick to their post and keep training despite the freezing weather in Mohe, the northernmost city in China, where the temperature is often below minus 40 degrees Celsius in winter. (Xinhua/Xie Jianfei)