Zhu Yunwen, a graduate student in the Department of Modern History, died suddenly while staying up late to work on his thesis. When he opened his eyes, he transformed into Emperor Jianwen of the Ming Dynasty who had just ascended the throne. He was familiar with history and knew that the original Jianwen lost his throne because of the reduction of the vassal clan, and also ended up with an unknown fate. He made up his mind that "the most important thing is to save life, and it is better to retain the vassal state than to reduce the vassal state." He possesses the attribute of a "historical complaint machine". When faced with the pedantic suggestions of court veterans, he always madly outputs modern jokes in his heart, but on the surface he has to pretend to be imperial and majestic, and often suppresses internal injuries.
