2. If there is chaos in the north, Sun Quan has no worries. Lu Su's plan to split the world in two is coming true. Take Jingzhou first (Lu Su didn't know Liu Bei when he designed for Sun Quan). What's more, Zhou Yu is the viceroy at this time, and the heart of Jingzhou is more prosperous. Liu Beihui was kicked down by Sun Wu;
3. Although Cao Cao is domineering, he has a special liking for the Han Dynasty and will not abolish the emperor (1. He promised not to usurp the Han dynasty and dared not break his word; 2. If Cao did not usurp the Han Dynasty, Cao Can would still enjoy the reality of the emperor and rely on the emperor to make Sun Quan and Liu Bei emperors. If you usurp Han, it's all Cao Cao's fault. It's not worth it. ) others won't.
4. Clear Guan Yu's name (this is useless)
Should not be released: There is no reason. The first point is whether Cao Can was captured by Cao Cao for profit, and the second is whether Cao Cao's death can be avoided. This is a technical job, and the operation is a little more troublesome and difficult.
There are three situations.
1. Let go and avoid one possibility, that is, capture Cao Cao alive, so that Cao Cao doesn't want to die for the hostages. Guan Yu can also trick him into coming and talking, capture him alive ... After that, Cao Cao failed to abandon his robe, cheat Lu Bu, kill Lv Boshe and assassinate Dong Zhuo. It can be seen that this person is afraid of death and will play dead. He won't commit suicide by secretly drinking good wine and food, and it will be of great benefit.
The death of Cao Cao is the most worrying issue. No matter whether the north is chaotic or not, Liu Bei is not safe.
If Cao Cao is caught dead, first kill all his men, seal them up and kill them, spread the flag of Sun Wu on the ground, destroy Cao Cao's body, threaten that Cao Cao died in Sun Wu's disorderly army, and threaten that Cao Cao escaped successfully but his whereabouts are unknown, making it difficult to tell the truth; If you can't kill him, give Sun Quan his head, which is what he ordered to kill.
If Cao Cao dies of hunger strike, he will kill all his subordinates and insiders, and choose a person with similar voice and appearance to be body double and continue to recite "Cao Cao". In that era of poor information, even if some people suspected that it was false, they dared not rule it out.
3. The third kind is the most special. It was ready to kill Cao Cao from the beginning, but it could accuse Wu Dong of avoiding disaster. After Guan Yu, an army was hidden on the road, wearing Wu Jun's military uniform. After Guan Yu released Cao Cao, he would kill him, let some soldiers go back, destroy Cao Cao's body, and make his life and death unknown. (In order to prevent Wu Dong from getting Cao Cao's head, killing Cao Cao is meaningless, so he can only destroy the body and pretend that Wu Jun doesn't know his identity, so he didn't take the body.
In short, it is easier to let go. Apart from holding him hostage, disintegrating the chaos in the north or destroying a clever enemy commander in advance for future wars, there is no other favorable simple reason not to let go. The above method is to help you justify yourself about "letting go". After all, this debate topic is unfair. Let's put it on the hypothesis, but we should come up with a specific operation plan to demonstrate its feasibility.