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Travel through Cheng Chongzhen and take over the "super company on the verge of bankruptcy" in Ming Dynasty. There is no silver bullet, only an insight into history. He talked about the restructuring of Haitrade's equity and internal treasury, using factories to absorb refugees, and using standardized firearms to build a new professional army. In the face of party disputes, natural disasters and border dangers, use system design to break deadlocks. This is the most hard-core time travel - not cheating to save the country, but a complete restructuring and reorganization of the ancient empire from finance, military to politics, ultimately reversing the course of civilization and letting the sun and moon flag fly all over the world.