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简介：Feng Yuanbiao paused and continued: "However, the key to Tongzhou's defense is not only to have enough troops, but also to ensure the smooth flow of waterways. If Jianlu, regardless of casualties, desperately attacks the city, and at the same time builds pontoons over the Tonghui River and the North Canal, If the waterway is cut off and outside support cannot be sent in, Tongzhou will be in danger.