Vehicles wait for the operation of the Meishan Toll Gate on the Chengle Freeway in Meishan City, southwest China's Sichuan Province, Feb. 4, 2009. A heavy fog hit Meishan on Wednesday, causing the closure of the Chengle Freeway connecting Chengdu, capital of Sichuan, and Leshan City, also in the province. [Yao Yongliang/Xinhua]
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