Briefly describe a story in "The Romance of the Three Kingdoms" that reflects Cao Cao's "treacherous" character

Dong Zhuo defeated Chao Gang, Cao Cao led several people to escape back to his hometown, passing by the home of his friend Chenggao Lu Boshe. Bo She went out, leaving only his five sons. Hearing the sound of their food dishes clashing at night, he mistakenly thought they were trying to kill him, so he killed them at night. He also said sadly: "I would rather let the world down, than let the world let me down!" This shows Cao Cao's insidious and ruthless tactics.

Cao Cao was afraid of being plotted and threatened that he had special powers. If anyone approached his bed while he was sleeping, he would be able to detect it even in his dream. He also said to his courtiers and concubines: "Don't come close to me casually when I sleep. As soon as you come close to me, I will - and I don't know it myself." One day, Cao Cao pretended to be asleep and deliberately didn't cover himself with a quilt. After reading Cao Cao's "Dream -" words, he kindly went to cover him with a quilt. However, the man's kindness was not rewarded and he was hacked to death by Cao Cao who jumped up with a sword. From then on, when Cao Cao was sleeping, no one around him dared to approach his bed.

Cao Cao claimed that "people want to endanger themselves, and they are easily tempted." He privately said to an attendant: "You came in front of me with a hidden knife, I told you my feelings, and then pretended to kill you. If you don't say it was arranged by me, then nothing will happen. I will reward you heavily afterwards." The unlucky attendant believed it and approached Cao Cao with the knife in his arms. Cao Cao then shouted "Heartbeat" and ordered the attendant to be taken down. Sure enough, a sharp knife was found in his arms. Cao Cao immediately ordered the attendant to be beheaded. Unfortunately, the attendant did not understand why he died until his death.

The story of Cao Cao killing the grain officer to silence the crowd. When confronting Yuan Shao, the army was running out of food and grass. Cao Cao was afraid that something would happen to the soldiers because they could not eat, so he called the grain officer to discuss countermeasures. The grain officer said: "When distributing food, small dendrobium can be used instead of large dendrobium." Cao Cao was happy. The ground agreed. But this kind of deception was definitely not concealed from the soldiers. There was a lot of discussion in the military camp, and everyone accused Cao Cao of being a liar. In fact, why didn't Cao Cao know that this method would be difficult to deceive the crowd? He already knew this. He said to the grain officer: "I want to lend you your head to calm the public's anger, otherwise things will be difficult to handle." Then he beheaded the grain officer, and his head was carried to the public in the military camp, with a bloody head still attached to it. Cao Cao's personal judgment: "Practice Xiaohu, steal the official valley, and kill the military gate." The responsibility for the general's lack of food was placed on the grain officer. When everyone saw that Cao Cao had beheaded the "corrupt official", they were relieved.

"Setting the knife on behalf of others" refers to doing things for others, mostly referring to writing articles for others. This idiom story takes place in Xudu (now Xuchang) of the Three Kingdoms.

Cao Cao was about to meet the Huns envoys. He felt that he was not handsome enough and was afraid that the Huns envoys would laugh at him and could not deter the Huns. So he asked Cui Yan, a handsome man at that time, to replace him and sit in the position of King Wei. Cao Cao pretended to be a guard and stood beside Cui Yan holding a sword. It is said that Cui Yan had a loud voice, a tall figure, sparse eyebrows, and a beard that grew to four feet. He looked majestic and steady. Cao Cao thought that such a person would be enough to scare the Huns. After the interview, Cao Cao was worried, so he sent someone to ask the Huns envoy privately: "What kind of person does our prime minister look like?" (Shishuo Xinyu said he was the King of Wei, which should be wrong. Cui Yan objected because of his objection. Cao Cao was promoted to King of Wei and executed. When he pretended to be Cao Cao, Cao Cao was not King of Wei.) The Huns envoy replied: "Prime Minister Wen Ya is not an ordinary person. However, the man standing behind the bed holding the sword is the great hero." Cao Cao listened. After hearing the report, he was shocked. Probably because he was afraid that the envoy would mislead Cui Yan when he reported to the Xiongnu Chanyu, so he sent someone to kill the envoy.

There are also examples like "One melon kills three concubines", etc., which reveal Cao Cao's ferocious side