The Sui Dynasty was a dynasty in Chinese history that spanned from 581 to 618. It was a new dynasty after the Northern and Southern Dynasties. The founding emperor of the Sui Dynasty was Yang Jian. His achievements included unifying the Northern and Southern Dynasties, building the Grand Canal, and establishing the imperial examination system. The demise of the Sui Dynasty was caused by internal divisions, political corruption, and external invasions. If you want to understand the history of the Sui Dynasty, you can read some historical books such as Sui Shi, Zi Zhi Tong Jian, Shi Ji, Han Shu, etc. In addition, you can also refer to some professional historical research institutions and university history courses to have a more comprehensive understanding of the history of the Sui Dynasty.