Marks by rubbing is seen on a pier of the Nanjing Yangtze River Bridge in Nanjing, capital of east China's Jiangsu Province, May 12, 2013. A cargo vessel, loaded with 12,500 tons of limestone, sunk after rubbing against a pier of the bridge on Sunday. A total of 18 sailors on board were all saved. (Xinhua)

Photo taken on May 12, 2013 shows the water area where a cargo vessel sunk near the Nanjing Yangtze River Bridge in Nanjing, capital of east China's Jiangsu Province. The vessel, loaded with 12,500 tons of limestone, sunk after rubbing against a pier of the bridge on Sunday. A total of 18 sailors on board were all saved. (Xinhua)

Photo taken on May 12, 2013 shows the water area where a cargo vessel sunk near the Nanjing Yangtze River Bridge in Nanjing, capital of east China's Jiangsu Province. The vessel, loaded with 12,500 tons of limestone, sunk after rubbing against a pier of the bridge on Sunday. A total of 18 sailors on board were all saved. (Xinhua)