Acrobats perform stunts during the stage show CHA at the Entertainment Hall at the World Expo Park in Shanghai, east China, on May 1, 2010. As the spectacular stage show designed exclusively for World Expo, CHA takes Chinese tea as its theme, and integrates martial arts, magic, stunts, dancing and other art forms to represent Chinese traditional tea culture in an artistic way.[Photo/Xinhua]

Acrobats perform stunts during the stage show CHA at the Entertainment Hall at the World Expo Park in Shanghai, east China, on May 1, 2010. As the spectacular stage show designed exclusively for World Expo, CHA takes Chinese tea as its theme, and integrates martial arts, magic, stunts, dancing and other art forms to represent Chinese traditional tea culture in an artistic way.[Photo/Xinhua]