A train runs past the Badong station along the Yichang-Wanzhou railway in central China's Hubei Province, Dec. 22, 2010. The Yichang-Wanzhou railway, linking Yichang in central China's Hubei Province and Wanzhou in southwest China's Chongqing Municipality, started operation Wednesday. The 377-kilometer-long railway, considered to be China's most difficult and expensive to build, snakes through 159 tunnels and 253 bridges in southwestern China's mountainous regions. [Xinhua]