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我国历史上元、明、清三代均定都北京,京师聚居着皇室宗亲、文臣武将等各种人,每年消费的粮油菜薪的数量十分惊人。但京郊一带所产的粮食连市民的需要也难满足,更无法供应皇室和达官显贵奢侈的消费需求。为此,元代天文、水利、数学家郭守敬率领军民工匠于1291年开凿了北京至通州间的运河,名曰通惠河,又称大通河、高粱
In the history of our country, the Yuan, Ming and Qing dynasties have all been capitalized in Beijing. The capitalists live in various royal families, such as the royal clan relatives and the military commanders. They consume a staggering amount of grain and oil salaries each year. However, the food produced in the suburbs of Beijing can hardly meet the needs of the public even more, and can not supply the luxury consumption demand of the royal family and the dignitaries. To this end, the Yuan Dynasty astronomy, water conservancy, mathematician Guo Shou-jing led military and civilian artisans in 1291 cut the canal between Beijing and Tongzhou, known Tonghui River, also known as Datonghe, sorghum