Students walk back home after school in Piancheng Village of Guyuan City, northwest China's Ningxia Hui Autonomous Region, Dec. 24, 2010. Most parts of Ningxia witnessed its first snowfall of this winter from Thursday afternoon. [Xinhua]

Students walk back home after school in Piancheng Village of Guyuan City, northwest China's Ningxia Hui Autonomous Region, Dec. 24, 2010. Most parts of Ningxia witnessed its first snowfall of this winter from Thursday afternoon. [Xinhua]