Students sign a banner calling for drug resistance at a middle school in Fuzhou, East 皇冠体育app's Fujian province, June 25, 2012. [Photo/Asianewsphoto]
A policeman shows drug samples to farmers in a village in Huaibei, East 皇冠体育app's Anhui province, June 20, 2012. [Photo/Asianewsphoto]