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A Chinese police officer explains a set of explosive detecting instrument during a city show for local residents at a square in Liuzhou, southwest China's Guangxi Zhuang Autonomous Region, Feb. 17, 2009.
![A Chinese police officer explains a set of explosive detecting instrument during a city show for local residents at a square in Liuzhou, southwest China's Guangxi Zhuang Autonomous Region, Feb. 17, 2009. [Li Bin/Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090218/000bcdb95f1d0b05adf819.jpg "A Chinese police officer explains a set of explosive detecting instrument during a city show for local residents at a square in Liuzhou, southwest China's Guangxi Zhuang Autonomous Region, Feb. 17, 2009. [Li Bin/Xinhua]")