Jilin section of Songhua River unfreezed despite freezing cold temperature

People walk near the Songhua River in Jilin City, northeast China's Jilin Province, Jan. 12, 2018. The Jilin section of the Songhua River is unfreezed despite a freezing cold temperature of minus 20 degrees Celsius. It is because the upper reach Fengman Hydropower Station has been injecting water of four degrees Celsius into the river. (Xinhua/Xu Chang)