Cao Cao racked his brains to get the counselor Xu Shu. Why not try to reuse it and "hide in the snow"?

First of all, because Xu Shu's heart is not in Cao Cao's camp, the person he wants to be loyal to most is Liu Bei, but his mother was under house arrest by Cao Cao, so he had to give up Liu Bei and go north to take refuge in Cao Cao. Of course, although Xu Shu was in Cao Cao's camp, he never planned for Cao Cao.

Although Cao Cao used various means, he failed to get Xu Shu to talk. Cao Cao faced him like a dead man. So for Cao Cao, since you are my counselor and you don't give me advice, what else do I need you to do? I might as well put you and your mother under house arrest.

Besides, Cao Cao is a talented person. He thought that one day Xu Shu would change his mind and work for him, but Cao Cao didn't see it until he died, so the house arrest lasted until the end.

Secondly, because Xu Shu's ability is too strong for me, Cao can only hide him in the snow. If he is released to Liu Bei, it will be a great threat to himself. After all, a top counselor can often play a decisive role in a war, which Cao Cao realized particularly clearly in Guo Jia.

And you know, before he left, Xu Shu put forward the last strategy for Liu Bei, that is, to ask Liu Bei to find Zhuge Liang, who praised Zhuge Liang and said that he was inferior to Zhuge Liang. In fact, in my opinion, Xu Shu and Zhuge Liang are both top counselors. Of course, Zhuge Liang did not disappoint Liu Bei in the end. After Zhuge Liang's acquisition, Liu Bei's strength developed greatly, not only gaining a firm foothold in Jingzhou, but also gaining a large base area in Shuchuan.