Combo photo shows the changes of the downtwon street in southwest China's Chongqing municipality during the last ten years. The upper one was taken in 1999, and the lower taken on April 15, 2007. Chongqing has experienced a great development after being upgraded into a municipality governed directly by the central government ten years ago. Chongqing is the economic and communication hub in southwest China. China now has four municipalities, Beijing, Shanghai, Tianjin and Chongqing. (Xinhua Photo/Yang Lei)
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