Photo taken on Sept. 13, 2009 shows the World Meteorological Pavilion of the 2010 Shanghai World Expo under construction in Shanghai, east China. The World Meteorological Pavilion, covering an area of 2,000 square meters, will look like a huge white cloud with mist surrounding it. Visitors will be able to see a rainbow when the angle of the sunshine is below 42 degrees.[Xinhua]