A sniffer dog checks a vehicle at an highway entrance to Guangzhou, capital of south China's Guangdong Province, Nov. 10, 2010. Guangzhou will witness the openning ceremony of the 16th Asian Games on Friday night. [Xinhua]

A policeman conducts security check at a highway entrance to Guangzhou, capital of south China's Guangdong Province, Nov. 10, 2010. Guangzhou will witness the openning ceremony of the 16th Asian Games on Friday night. [Xinhua]