Sui Dynasty Narrative

I have been thinking about this article for a long time. It mainly talks about some things about the Northern and Southern Dynasties to the end of the Sui Dynasty in the more than seventy years from 541 to 618. The article basically adheres to the historical data as the basis, with the era and specific characters as the main line, and adds the writing style of the novel and the psychological analysis of the characters, as well as some evaluation of the political and economic system at that time. The important point to note is that this article describes official history. The sources include "Sui Shu", "Northern History", "Zi Zhi Tong Jian", "Zhou Shu", "Bei Qi Shu" and other historical materials. Although some literary description techniques and expressions are used, most of the historical events and characters in the article, and even the dialogue between the characters, are from historical sources. For the sake of the smoothness of the article, the sources are not listed one by one. The article mainly talks about the Sui Dynasty, a short-lived dynasty like the Qin Dynasty, which died in less than forty years. Although he was short-lived and criticized, he had a peculiar history: it was a prosperous and unified era, with warehouses filled with food that could not be eaten for fifty or sixty years, and his emperor was hailed as the "Saint Khan" by the Turks; at the same time, he was a violent and short-lived dynasty. So, what did the two emperors of the Sui Dynasty do to cause the death of the second generation of the "Sui"?