The Sui Dynasty in Upheaval

The physical book I read in junior high school only had the first half, and I never found it. Now I found it by chance, and found out that the second half is really confusing. One moment, I want to replace Yang Guang, and the next moment, I defend him. I keep making mistakes. In the end, it is funny. I clearly said it. She was responsible for the uprising, and she was hiding in her room and unwilling to come out. She really shouldn't have read it. I kept the memories of that time and thought it was such a good article. It was very uncomfortable after reading it. It was like eating shit. I was hesitant to continue reading because of my obsession at that time. It was really uncomfortable.

What does this article want to express?

I cried when I saw it, this ending, eh, it came too fast