A passenger ship sails in the Xiling Gorge on the Yangtze River in Zigui County, central China's Hubei Province, in March 2005. The construction of the Three Gorges Dam in Hubei's Yichang City has turned at least 420-kilometer dangerous section of the upper reaches of the Yangtze River into a smooth waterway.
Undated file photo shows ships sailing in the formerly dangerous Kongling Shoal on the Yangtze River in central China's Hubei Province.
Cargo ships pass the lock chamber of the Three Gorges Dam on the Yangtze River in Yichang, central China's Hubei Province, on April 18, 2006.
A worker leads a truck onto a ship at a dock in Zigui County, central China's Hubei Province, May 17, 2006.
Tourists view a scene of the Three Gorges on the Yangtze River May 2, 2006.