Cao Cao fell in love with Guan Yu, who "killed Hua Xiong with warm wine", at first sight. On the one hand, Guan Yu has the appearance of heaven and man, and on the other hand, Guan Yu has unparalleled martial arts. After getting in touch with Guan Yu step by step, Cao Cao was deeply impressed by Guan Yu's once upon a time in america and the sense of righteousness in the Spring and Autumn Period. In front of all the leading men under his command, Cao Cao openly said, "I have always loved Yun Chang's martial arts talents" and said, "You should follow them". Cao Cao loved Guan Yu's talent deeply. Although he couldn't use it for himself, they were close friends, so he couldn't bear to hurt them.

At that time, it was on the eve of the battle of Guandu, and Guan Yu ran to find Liu Bei, who was in Yuan Shaoying. Cheng Yu once explicitly reminded, "If the longitudinal envoy belongs to Yuan Shao, it will be even more powerful. If you don't chase and kill it, you will avoid future troubles.

"Rational analysis, Cheng Yu's words are reasonable and accurate, but Cao Cao did not adopt them. When Guan Yu picked out his robe, Xu Chu was furious and said, "This man is too rude. Why not catch him?" Cao Cao stopped it with words.

Guan Yu did not move his heart when making money or bribes, and Cao Cao admired him. The friendship between Cao Cao and Guan Yu is far from being understood by others. Cao Cao is the master of great talents, not petty and narrow-minded. For the friendship between the two, Cao Cao will never make a move of "destroying the piano if you can't get it". In a word, Cao Cao would never harm Guan Yu. Cao Cao has made a promise before, so he can't break his word, and he wants to win the trust of the world.

The ancients valued faith. Cao Cao personally promised Guan Yu before, so he won't break his word. Moreover, Guan Yu came to understand that a good beginning and a good end, in contrast, how can Cao Cao make a shameful act of going back on his word? Cao Cao explained to Cheng Yu, "I made a promise in the past, how can I break my promise?" He also said to Guan Yu himself, "I want to win the trust of the world, and Anken has a negative preface!"

Cao Cao released Guan Yu, and he really won the trust of the world, and did enough invisible propaganda for himself, so that all over the world rushed to join him. Since then, Xu You, Zhang He and Gao Lan have defected to Cao Cao during the fierce battle between the two sides. Cai Mao and Mrs. Cai have taken refuge in Cao Cao, and even Zhang Zhao, the cabinet minister of Soochow, even moved to surrender to Cao Cao. Author Luo Guanzhong laid the groundwork for writing

Yellow River Ferry, and Xia Houdun led 3 cavalry to catch up with Guan Yu, vowing to capture him, first to avenge Qin Qi, and second to obey Cao Cao. After the fight between Guan Yu and Xia Houdun, the envoy sent by Cao Cao appeared three times, stopped and released.

The first two emissaries only took the official documents of customs clearance, but Cao Cao didn't know that Guan Yu broke through the customs clearance and killed the general when the official documents were issued, so Xia Houdun was adamant. Zhang Liao arrived in time and sent Cao Cao's message: "On the orders of the Prime Minister," because he heard that Yun Chang had killed the generals, he was afraid that the road would be blocked, and he sent me to send a message to all the passes and let them go. "Xia Houdun helpless, had to release.

Huarong Road, when Cao Cao came to Guan Yu, he understood it with reason and moved it with emotion, and said, "Can you remember it when you cut the generals through five passes?" A gentleman values faith. The general knows the Spring and Autumn Annals well, but don't you know that Yu Gong's pursuit of Zizhuo's obedient son? " . Guan Yu remembered his old kindness and let him go.

Looking back and forth, we can see that Cao Cao's three orders for release are the great foreshadowing of Luo Guanzhong's writing. This foreshadowing is really wonderful, and at the same time it magnifies the meaning of Cao Cao and Guan Yu infinitely. Cao Cao didn't release water, can Guan Yu do it? I'm sure

Guan Yu's ability to "go through five customs and defeat six generals" depends on his strength, not on Cao Cao's release of water. Let's look at the strength of "five customs and six generals" first.

Dongling Pass, Kong Xiu. "The two horses intersect, only one is combined, the steel knife rises, and Kong Xiu's body is under the horse."

Luoyang, Meng Tan+Han Fu. Meng Tan was defeated in a three-in-one battle, and was caught up by Guan Yu's red hare. "Only one knife, cut in two." Han Fu stabbed Guan Yu in the left arm, and Guan Yu was furious and dispersed all the troops. "Hand-to-hand knife fell, and Han Fu was beheaded under the horse head and shoulders."

sishuiguan, Bian Xi. "Guan Yu separated the hammer with a knife and split Bian Xi into two parts with one knife."

Xingyang, Wang Zhi. Cut it in half with a knife.

huanghedu, Qin Qi. "The intersection is only one, Guan Yu's knife rises, and Qin Qi's head falls."