For the first time in history the unruly Yellow River has been made to flow as man directs. By blocking the river at God's Gate, one of three rock islands at Sanmen Gorge, with a stone cofferdam, the...
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For the first time in history the unruly Yellow River has been made to flow as man directs. By blocking the river at God's Gate, one of three rock islands at Sanmen Gorge, with a stone cofferdam, the...