What is the main reason why Sima Yi decided to withdraw his troops when his plan was empty?

The thirteen articles of Sun Tzu's Art of War tell all the secrets of the art of war, but the core sentence is: "Soldiers are cunning. So, you can show that you can't, use it and show it, show it from a distance, and vice versa. Lure it for profit and take it for chaos. " Facing the siege crisis at the gates, Zhuge Liang was able to sit on the rostrum and play the piano as if nothing had happened. The enemy was too scared to take another step with his own strategy.

During the Three Kingdoms period, Zhuge Liang lost his strategic location-Jieting because he misused Ma Su. Wei took advantage of the situation to lead Sima Yi to the Xicheng where Zhuge Liang was located. At that time, there were no generals around Zhuge Liang, only a group of civil servants. Half of his 5,000 troops went to transport food and grass, leaving less than 3,000 soldiers in the city. At the critical moment, Zhuge Liang did not choose to abandon the city and escape, but silently adhered to it.

When Sima Yi's army came, Zhuge Liang asked some veterans to clean outside the city, boarded the tower by themselves, played the piano and drank tea, and sang leisurely, which seemed very confident. After seeing Zhuge Liang's operation, Sima Yi began to doubt. The army has been in Enemy at the Gates, but he is so carefree and in the mood to play the piano? I'm afraid there's something fishy inside, so I dare not lead an army to attack the city. Finally, we had to withdraw our troops in despair.

But the world is not clear, in fact, Zhuge Liang used the empty city plan to perfection, and two extremely talented people behind him have made great contributions. You may wonder that Zhuge Liang is talented, and all this comes from his means. So what is the relationship between the success of the "empty city plan" and the two extremely young people behind him? It's like a film and television drama. In addition to the performance of the protagonist, it also needs the cooperation of supporting actors. Everyone must perform well to get praise and high marks.

If his behavior is extremely chaotic, then Sima Yi will immediately see through Zhuge Liang's scheme, then Zhuge Liang may be captured alive by Sima Yi and Shu will be defeated. There is no denying that the performance of extremely talented people can be said to be crucial. If they are not calm beyond their age, then this empty plan will definitely fall through. what do you think?