Mist appears on the Yangtze River in Yichang, gateway of The Three Gorges in central China's Hubei province on the morning of Jan. 25, 2016. Cold waves hit most parts of China recently. Temperature in northern Hubei plunged to 10 degrees Celsius below the freezing point. However, the water temperature of the Yangtze River dropped slower than ground temperature. The temperature gap produced mist on the Yangtze River. (CNS/Zhou Xingliang)