Pupils write their signatures on the blackboard with anti-drug design at the Beiguanjie Elementary School of Xingtai City, north China's Hebei Province, June 25, 2008. The elementary and middle schools in Xingtai City hold drug ban activities on the theme of Creating Drug-Free Campus to mark the International Day Against Drug Abuse and Illicit Trafficking which falls on June 26.(Xinhua/Huang Tao)Children from a kindergarten write their signatures during a drug-ban publicity activity at the Wuhan Botanic Garden of the Chinese Academy of Sciences(CAS), in Wuhan, central China's Hubei Province, June 25, 2008. Some 90 kg of various confiscated drugs, including the ice sculpture, Ketamine, dancing outreach, etc, were burned at the activity there on Wednesday. (Xinhua/Wang Zhengwu)Policemen put the drugs to flame during a drug-ban publicity activity in the Wuhan Botanic Garden of the Chinese Academy of Sciences(CAS), in Wuhan, central China's Hubei Province, June 25, 2008. Some 90 kg of confiscated drugs, including the ice sculpture, Ketamine, dancing outreach, etc, were burned at the activity there on Wednesday.(Xinhua/Wang Zhengwu)