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在交通工具落后的封建时代,水路运输是最便捷、低廉的运输方式,故流通中心型城市也多集中在主要水道沿线。明代禁海,南北物资交流主要依靠京杭大运河,在运河沿线兴起了一批繁荣的商业城市。清代康熙年间开放海禁,清政府在东南沿海设立江、
In the feudal era of backward transport, water transport is the most convenient and inexpensive mode of transport. Therefore, cities with distribution centers are also mostly concentrated along major watercourses. Forbidden sea in the Ming Dynasty, North-South material exchange mainly depends on Beijing-Hangzhou Grand Canal, along the canal rise a number of prosperous commercial city. During the reign of Kangxi in the Qing Dynasty, the Qinghai Sea ban was banned. The Qing government set up a river in the southeast coast,