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As part of the efforts to build a drug-free society, the 3rd Adolescent Anti-drug Knowledge Competition was held in Zhongshan Technical Secondary School. About 500 students from 21 Junior High School, 19 Senior High School and 6 technical Secondary School participated in the event. The winners of the competition will be awarded with letters of appointment of Teenage Anti-drug Ambassadors in Zhongshan. The preliminary competition was held on Oct. 26-27 in Zhongshan Technical Secondary School and the final will be held in the middle of November in Wuguishan Cultural Center.