A train runs on the railway bridge of the Yangtze River Bridge in Nanjing, capital of east China's Jiangsu Province, Dec. 29, 2011. As China's first self-designed and self-constructed highway-railway bridge, the Yangtze River Bridge of Nanjing greeted its 43th anniversary of opening on Thursday since it was completed and opened to traffic on Dec. 29, 1968. [Xinhua/Wang Qiming]