How did Xiangzi fall?

Because this society is too unfair to let good people have a way out. Xiangzi is honest, strong and persistent. But society kept him from being brutally attacked. Xiangzi in the novel experienced three ups and downs. Finally, Xiangzi lost confidence in life. So, I became insensitive. 1, after saving for three years, I finally bought my own car for one year, but the cart was quickly taken away by soldiers. The second time, the money was blackmailed by Detective Sun. Tigress died in childbirth, so Xiangzi had to sell the car to bury Tigress. This is three ups and downs! That's the main plot of the book!