At the end of the Sui Dynasty, Yang Di had no choice. Under his cruel rule, the people rose up, and the Wagang peasant uprising dealt the greatest blow to the Sui Dynasty, making the rule of the Sui Dynasty crumbling. Li Shimin, who established the Tang Dynasty after Li Yuan proclaimed himself emperor and inherited the throne, knew the power of the people through the lessons of the Sui Dynasty and discussed with Wei Zhi the truth that "water can carry a boat, but it can also overturn it". Therefore, he became diligent and loved the people, reducing all kinds of taxes of the people, which led to the prosperity of the "chastity rule" in the Tang Dynasty during the reign of Li Shimin.