The flotilla of a super marine Tianbao 01 oil tanker sails through the dual-passage and five-step navigation lock of the Three Gorges Project in Yichang City, central China's Hubei Province, July 1, 2008. The 24.2-meter high Tianbao 01 oil tanker, a China-made new vessel for the order from Greece, is dragged by tugboat (L) to waltz through the Three Gorges Dam and Gezhouba Dam under the multiple water levels control methods by the Three Gorges Navigational Bureau.