Cao Cao was a very "scheming" strategist. In order to prevent his subordinates from endangering his own interests, he told his attendants around him: "When I sleep, you can't come close to me casually, and if you get close, I will kill people. One day, he pretended to be asleep, and when the guards saw the quilt falling, they went forward to cover him, but Cao Cao suddenly sat up, swung his sword and killed the attendants, and then lay down to sleep. When he woke up, he pretended not to know and asked, "Who killed the person who was waiting for me?" Since this incident, whenever he slept, no one else approached him. Cao Cao said, "If someone wants to harm me, I will feel something in my heart." When everyone hears him say this, they will all believe it and be suspicious. One day he said to one of his attendants, "You have a knife in your arms and come quietly to me." I said I was aware. As long as you don't tell the truth about this matter, make sure you're okay, and I'll repay you heavily after it's done. "This attendant believed it to be true, so he was not afraid at all after his arrest, but he was killed. The man was dying before he knew he had been deceived, but it was too late. From then on, people thought that Cao Cao really had this skill, and no one dared to murder him.
The world is very complicated, people do things, you may wish to add a "protective layer" to yourself first.
![When the general returned from a victorious battle, the whole city came out to greet him, and he waved his hands and smiled at his attendants and said: Slaughter the city[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)