Special unit policemen show security guards and faculty staff defense skills in a middle school in Foshan city, south China's Guangdong province, May 12, 2010.

Two professional security guards escort a group of pupils to school in Beijing on May 12, 2010. Over 2,000 professional security guards equipped with anti-riot helmets, knife-proof vests, gloves and rubber batons are dispatched to 500 schools and kindergartens to guard school grounds.