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Locha6 t1_j5swfqw wrote

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[deleted] t1_j5sxosr wrote

[deleted]

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Words_Are_Hrad t1_j5t5aqa wrote

>250k people or dams 1500 years ago

China's population during the warring states period ~2500 years ago was ~40 million. And the oldest dams in the world date back ~5000 years ago. Hard to imagine China not having dams 1500 years ago.

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