Why did the plot of Liangshan heroes doing evil appear so many times in the book?

" Water Margins " was one of the ancient Chinese novels. There were many plots of Liangshan heroes doing evil. The main reason was that Liangshan heroes were composed of a group of righteous people who resisted oppression. Their goal was to overthrow the corrupt court and maintain social justice and fairness. The evil plots of Liangshan heroes in Water Margins mainly included the following aspects: 1. Rebel against the imperial court: The goal of the Liangshan heroes is to overthrow the imperial court, so they will resist the corrupt behavior of officials, including cracking down on corrupt officials and exposing cheating in the examination hall. 2. Robbery of property: Liangshan heroes often robbed the property of the government and rich families to meet their own expenses and survival needs. 3. Murder and arson: Liangshan heroes not only kill people but also set fires. They often use fires to destroy cities and villages, causing huge damage and losses. Rape women: Some members of Liangshan heroes like to rape women. Their behavior not only violates morality and law, but also destroys social ethics and morality. The Liangshan heroes 'behavior not only violated the law and morality, but also caused great harm to society. Therefore, in the Water Margins, there were many plots of their evil deeds.