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At Yangtze Delta, about 160 miles[160kmsouthwestofShanghaiLiangzuCity’sarchaeologicalruinsarelocatedThereamoreadvancedculturebloomingabout5300yearsagothanksfortheengineeringofmanyhydraulicstructures The fortified city has a complicated system of navigational canals, dam and water reservoir. This system makes it possible to cultivate many areas of agriculture throughout the year. In the history of human civilization, it is one of the first examples of developed communities based on a water infrastructure….