Photo taken on May 4, 2010 shows green covered wall of Baosteel Stage in Shanghai Expo Park. The colour of green is prevailing inside the World Expo Park, which embodies the idea of low-carbon expo, and makes the park environment enjoyable. [Xinhua]

Photo taken on April 22, 2010 shows green art works in Shanghai Expo Park. The colour of green is prevailing inside the World Expo Park, which embodies the idea of low-carbon expo, and makes the park environment enjoyable. [Xinhua]