Idiom story about Li Kui scolding Song Jiang_The origin of the idiom "Li Kui scolding Song Jiang" and who is the protagonist?

Source: Chapter 73 of "Water Margin".

Black Whirlwind Li Kui and the prodigal Yan Qing left Siliu Village and were about to enter Jingmen Town when it was getting late and they stayed at Liu Taigong's village. That night, I heard that the Taigong's daughter had been taken away by Song Jiang in Liangshanbo two days ago. Li Kui believed it to be true and was so angry that as soon as he went to Liangshan Village, he went to the Zhongyi Hall, pulled out a big ax, first chopped down the apricot yellow flag, and tore the four words "Practice for Heaven" into pieces, and then went to the hall with the ax to kill Song Jiang. . Everyone stopped him in a hurry and asked what was going on. Li Kui was so angry that he couldn't tell! It was Yan Qing who told what happened. After Song Jiang heard this, he shouted: "How can such a thing happen?" Li Kui opened his strange eyes and shouted loudly: "I usually treat you as a good man, but you turn out to be a beast! Return the woman to Mr. Liu quickly, otherwise, I will Sooner or later I will kill you!" Song Jiang said: "Don't make any noise. If Liu Taigong is not dead, the dealers are here, so we can face him together. What crime should you be guilty of if you don't know how to do it?" Li Kui said, "If it weren't for you, I would lose my head to you!"

Everyone came to Liu Taigong's village. Li Kui asked Taigong to come and identify Song Jiang carefully. He stood beside Song Jiang with an ax in hand, waiting for the old man to say yes before taking action. Liu Taigong looked at it again and again, shook his head and said, "No." Song Jiang said, "Liu Taigong, I am Liangshanbo Song Jiang. Your daughter was deceived by someone with a false name. If you find out, I will I'll make the decision for you." He turned around and said to Li Kui, "Come back to the village to argue!" After that, Song Jiang and others returned to the village first.

Yan Qing asked Li Kui: "Brother Li, what should I do?" Li Kui said: "I was too impatient and did something wrong. Since I lost the head, I will cut it off with a knife and you can take it." Just go and offer it to your brother." Yan Qing advised him not to die, and taught him to take off his clothes, tie a hemp rope, put a thorn stick on his back, and prostrate himself in the Zhongyi Hall, asking for mercy. At this point, Li Kui had no choice but to go back to the village with Yan Qing, kneel in the hall, bear a thorn and plead guilty, and apologize to Song Jiang.

Song Jiang pretended to be unforgiving and wanted to act in accordance with military orders and take the blame with his head. Everyone interceded for Li Kui. Song Jiang said: "It's okay to spare him, but he wants to capture the fake Song Jiang and get Liu Taigong's daughter back." After hearing this, Li Kui jumped up with joy and said, "I'm going to catch the turtle in the urn - bring it as soon as I can!" "Later, Li Kui and Yan Qing found out that Wang Jiang and Dong Hai from Niutoushan had committed the crime, so they killed the two thieves and sent the woman back to Liu Taigong's village.

"Li Kui scolded Song Jiang" is a metaphor for offending someone and then apologizing to them.