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Photo taken on Sept. 20, 2009 shows the Performing Arts Center in the World Expo Park in Shanghai, east China. Construction of "one axis and four pavilions", the Axis, China Pavilion, Theme Pavilion, Performing Arts Center and Expo Center, all entered internal construction phase recently. As the landmarks of the Expo Park, "one axis and four pavilions" will become permanent buildings in post-Expo Shanghai. [Xinhua]