People walk in the snow in Mudanjiang, northeast China's Heilongjiang Province, Nov. 7, 2010. A cold front was sweeping the northern parts of China, causing snowfall or sleet and making the temperature drop in the areas. (Xinhua/Zhang Chunxiang)

Snow covers cars outside a restaurant in Mudanjiang, northeast China's Heilongjiang Province, Nov. 7, 2010. A cold front was sweeping the northern parts of China, causing snowfall or sleet and making the temperature drop in the areas. (Xinhua/Zhang Chunxiang)