Photo taken on April 23, 2010 shows the night view of the Japan Pavilion during the trial operation of the 2010 Shanghai World Expo, in Shanghai, east China. The structure nicknamed "pod" combines traditional Japanese knowledge for living in harmony with the environment with the latest environmental control and materials technology. [Xinhua]

Photo taken on April 25, 2010 shows the purdah fence of Switzerland Pavilion in the World Expo Park in Shanghai, east China, April 25, 2010. With degradable walls, the structure is a hybrid construct of technology and nature that combines town and country in a perfect balance. [Xinhua]