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Technical difficulties in building the Beijing-Hangzhou Grand Canal in Sui Dynasty
Controlling the flow direction of water level, earthwork excavation and transportation, how to connect with rivers, climate, geological environment, migration, and different topography and elevation of Haihe River, Yellow River, Huaihe River, Yangtze River and Qiantang River, among which the Yellow River has the highest elevation and the Huaihe River has the lowest elevation, will bring difficulties to the construction of the Grand Canal. Our ancestors overcame difficulties with their wisdom and creativity, and then we were proud of the Grand Canal.
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