Pupils are seen at a village school in Du'an county, South China's Guangxi Zhuang autonomous region, May 30, 2012. Some village schools in Guangxi's mountainous areas are called "mini schools" because of their low enrolment. Usually, there are about 20-30 students at a mini school. [Photo/Xinhua]

Children of the Number 5 Kindergarten dress up as cigarettes to publicize the harm of smoking to children in Huainan, East China's Anhui province, May 31, 2012. May 31 marks the 25th World No Tobacco Day. [Photo/CFP]