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Chapter 776 Water is not close
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Chapter 778 Open rain
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... d "Du Shuichang" to maintain the weir head project; during the Shu Han Dynasty, Zhuge Liang set up weir officials and enlisted Dingqian 200 people to protect him. Since then, all dynasties have been headed by the county decree where the head of the weir is located. By the Song Dynasty, the year-old repair system had been put into effect.
In addition, there are upgrades to basic materials, from the earliest bamboo cage masonry to the current reinforced concrete, which has also ensured the ...
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