The more than thirty years of the Sui Dynasty was a short period of intense color in ancient history, a link between the past and the future. It was also a gorgeous stage where the king's flag changed on the city wall, and you sang and I appeared. Yiwei's "A Close Study of the Forty Years of the Sui Dynasty: A Great Dynasty Comparable to the Qin Empire" provides a panoramic description of the history of the Sui Dynasty in three sections: the rise, prosperity, and decline. It is of great help to quickly grasp the history of the Sui Dynasty and to think beyond the temporary slander of this period of great transition.