Visitors view an electric vehicle during the China International Energy Saving, Emission Reduction and New Energy Science and Technology Expo at the Beijing Exhibition Center in Beijing, capital of China, on March 22, 2009. More than 200 companies and organizations took part in the five-day expo, opened on March 19. [Xinhua]

Visitors view energy-saving defueling pump models during the China International Energy Saving, Emission Reduction and New Energy Science and Technology Expo at the Beijing Exhibition Center in Beijing, capital of China, on March 22, 2009. [Xinhua]