File photo taken in March 2006 shows the Three Gorges Reservoir in Yichang, central China's Hubei Province. The flood control storage of the Three Gorges Reservoir is 22.15 billion cubic meters, the most remarkable in the world. (Xinhua Photo)
Workers install a pressure diversion pipe for the power generating station on the left side of the Three Gorges Dam in Yichang, central China's Hubei Province, in August 1999. The diversion pipe is the largest of its kind in the world's hydropower generating sets. (Xinhua Photo)
Photo taken in April 2006 shows the ship lock of the Three Gorges Dam in Yichang, central China's Hubei Province. The two-way five-step lock is one with the most steps and the highest water level on an inland river in the world. (Xinhua Photo)
File photo taken in August 1998 shows the diversion canal of the Three Gorges Dam in Yichang, central China's Hubei Province. The diversion canal was called the largest man-made river in the world. (Xinhua Photo)
File photo taken in July 2005 shows the installing of the runner of the last unit of the power generating station on the left bank of the Three Gorges Dam in Yichang, central China's Hubei Province. The Three Gorges hydropower station is the biggest in the world. (Xinhua Photo)
File photo taken in August 2001 shows workers concreting in the construction of the Three Gorges Dam in Yichang, central China's Hubei Province. The total amount of concrete of the Three Gorges Dam reached 1.61 million cubic meters, the most in the world. (Xinhua Photo)