Visitors look at a train exhibited at the Pavilion of City Being in World Expo Park in Shanghai, east China, May 11, 2010. The pavilion exhibited trains of different times to show the change of transportation. [Xinhua] 

A train exhibited is seen at the Pavilion of City Being in World Expo Park in Shanghai, east China, May 11, 2010. The pavilion exhibited trains of different times to show the change of transportation. [Xinhua]