Students of higher grades give presents to those of lower grades at a school in Hangzhou, capital of east China's Zhejiang Province, Sept. 1, 2010. Most primary schools and middle schools in China started the new semester Wednesday. (Xinhua/Ju Huanzong)

Students clean the hallway at a school in Xinjian County, east China's Jiangxi Province, Sept. 1, 2010. Most primary schools and middle schools in China started the new semester Wednesday. (Xinhua/Zhou Ke)