Chongqing's first subway starts trial run

Workers prepare for the trial operation of the first subway line in Southwest China's mountainous metropolis of Chongqing, July 28, 2011. The 15.7 km long subway line has a total of 13 stations and is the first of its kind built in a mountainous place. [Photo/CFP]

Local residents wait inside a subway station before getting onboard the train to experience the trial operation of the first subway line in Southwest China's mountainous metropolis of Chongqing, July 28, 2011. [Photo/CFP]