Photo taken on Feb. 26, 2012 shows the snow-covered rooves in Hangzhou, east China's Zhejiang Province. Hangzhou witnessed a spring snowfall on Sunday morning as a cold front was forecast to hit China's southern regions, dragging down temperatures by three to six degrees Celsius in the middle and lower reaches of the Yangtze River and regions south of the river from Feb. 26 to 28, according to the National Meteorological Center. [Xinhua/Xu Hui]