During the Wude period of the early Tang Dynasty, Li Yun, as the biological son of the eldest grandson Wugou, was forced to live among the people and pretend to be a useless person. Changsun Wuji pretended to be a businessman and came to visit, and the young man's words finalized the Xuanwu Gate change. Help Li Shimin secure the throne, and use monks and Taoism to build momentum and eliminate the infamy in the world. Instead of stepping into the court, he could raise pigs, mix perfume, and develop spirits in the countryside to accumulate capital. Living in the wilderness, every strategy stirred up the situation in Chang'an City.