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简介：Although there are no heavy artillery such as the Hongyi Cannon, there are still a lot of firearms at the top of Kaifeng City. Together, the four cannons amount to nearly a hundred Folan cannons of various colors, and there are two hundred Tiger Crouching Cannons and general cannons. Facing the siege of half a million bandits, Kaifeng was able to hold on. In addition to the strong city, the power of artillery also played a major role.