A boy plays the role of a bullfighter during a performance at the Madrid Case Pavilion of Urban Best Practices Area (UBPA) at the World Expo Park in Shanghai, east China, on June 10, 2010. [Xinhua]

A clown dressed-up as a bullfighter fights with a cart during a performance at the Madrid Case Pavilion of Urban Best Practices Area (UBPA) at the World Expo Park in Shanghai, east China, on June 10, 2010. [Xinhua]