Photo taken on Dec. 28, 2010 shows a station of Chongqing Subway Line No.3 in southwest China's Chongqing Municipality. The subway line, with the highest speed of 75km per hour, started its trial run on Tuesday. It will be formally put into operation in June of next year. [Xinhua]

People wave hands on a trial train of Chongqing Subway Line No.3 in southwest China's Chongqing Municipality, Dec. 28, 2010. The subway line, with the highest speed of 75km per hour, started its trial run on Tuesday. It will be formally put into operation in June of next year. [Xinhua]