Workers are seen at the Changqing depot of Wuhan Subway Line No. 2 in Wuhan, capital of central China's Hubei Province, July 14, 2012. The Line No. 2 is the first subway line of the city, also the first subway line across the Yangtze River. The construction of the project started in 2006. It is expected to be put into operation in the end of 2012. [Xinhua]