The Empress Passed the Throne to Her Nephew, So the Prince Built Weapons to Put Down the Rebellion

Yun Yi transmigrated as a prince of the Great Yong Dynasty, only for his empress mother to pass the throne to her nephew and make him a carefree feudal prince instead. So be it. Life is short, and there's nothing wrong with eating, drinking, and enjoying himself. But before he had enjoyed even a few days of luxury, the new emperor moved to abolish the fiefs, determined to drag him to the capital for execution. It turned out he had long been a thorn in the new emperor's side. Fortunately, before transmigrating, he had been an arms expert who knew how to manufacture all kinds of guns and cannons. If he couldn't remain a feudal prince, then he would raise an army and put down the rebellion. You may have armies of iron and horses, but my steel tide has never feared anyone!