Welders work on "Sunny Valley", a horn-shaped building, lining the Expo Axis in Pudong Section of the Expo Site in Shanghai, September 13, 2009. The major structure of the Expo Axis, the main entrance to the World Expo 2010 site and connecting to four major pavilions through an elevated platform and underground passages, was finished on September 13, 2009.[CFP]

"China Pavilion" and "Sunny Valley" are seen in this photo taken on Sept 13 in Pudong Section of the Expo Site in Shanghai. [Xinhua]

Welders work on the "Sunny Valley", a horn-shaped building, lining the Expo Axis in Pudong Section of the Expo Site in Shanghai, September 13, 2009.[Xinhua]