THE Dujiangyan irrigation system that has turned the Chengdu plain of Sichuan province into a land of constant good harvests was actually built over 2,200 years ago during the Warring States period...
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THE Dujiangyan irrigation system that has turned the Chengdu plain of Sichuan province into a land of constant good harvests was actually built over 2,200 years ago during the Warring States period...