 Freighters pass through a lock during a trial navigation at Three Gorges Project in Yichang, Central China's Hubei Province, April 30, 2007. After seven months' construction, the lock will reopen double-line navigation on May 1, 2007, Xinhua reported.
 Freighters pass through a lock during a trial navigation at Three Gorges Project in Yichang, Central China's Hubei Province, April 30, 2007. After seven months' construction, the lock will reopen double-line navigation on May 1, 2007, Xinhua reported.
 Freighters wait to pass through a lock during a trial navigation at Three Gorges Project in Yichang, Central China's Hubei Province, April 30, 2007. After seven months' construction, the lock will reopen double-line navigation on May 1, 2007, Xinhua reported.
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