What is the story of "Cao Aman feasts his ministers and kills three concubines with one melon"?

The story of Cao Cao's "One Melon Chops Three Concubines" is included in The Enduring Department of Tan Gui (zhi) in Ancient and Modern Times, and it is intended to talk about greed and coolness. On Cao Cao's lean body, it means that a lean man is like a tiger, and a lean man is cruel and profound. Of course, this is just a story told by Cao Aman in a joke book "An Overview of Ancient and Modern Tan" compiled by Feng Menglong of the Ming Dynasty. There was no watermelon to eat in Cao Aman. Some subspecies of melon, such as thin-skinned melon, are Chinese specialties, which are mentioned in the Book of Songs. Watermelon, on the other hand, was introduced from the west, and it was not introduced to China until the fourth and fifth centuries. Why is this? People are right, melons are just sweet! In a word, kill people for a reason! The problem is that none of the ministers dare to stand up and ask questions like this.

At that time, the story was probably like this. Cao Cao held a banquet for his ministers. After eating and drinking enough, he ordered dessert, so Cao Cao's three concubines served watermelons in turn. Cao Cao asked her if the watermelon was sweet, but the concubine said it was sweet. As a result, she pulled it out and cut it down. On the second stage, the same melon, the same posture, but this concubine is more witty and answers that it is not bitter. The story of "Cao Aman feasts and ministers, one melon kills three concubines" comes from Feng Menglong's notebook novel "An Overview of Ancient and Modern Tan" in Ming Dynasty, which also vividly describes Cao Cao's image of "being moody and treating human life like dirt".

And this Cao Cao is a suspicious master. When Cao Cao was sleeping, the guards covered him because the quilt fell to the ground, but Cao Cao cut him off with a knife and said brazenly, "I dream of killing people"! It is said that one summer, the heat was unbearable, and Cao Cao was idle and bored, so he called all the civil servants to have a drink in a water pavilion. After three rounds of wine and five flavors of food, everyone guessed the rules and regulations, and most of them were slightly drunk, and the scene seemed chaotic. In the middle of the night, Cao Cao slept dishonestly, and rolled the quilt underground. When the waiter saw it, he picked it up and tried to cover it for him, but he was hacked to death by Cao Cao with his sword.