Why did Cao Cao ask Liu Bei to intercept Yuan Shu?

In fact, Cao Cao didn't say in the Romance that "I would rather give the world than the world". There is no record of this sentence in history. On the issue of treating Liu Bei, Cao Cao Group has two opinions, one is that Liu Bei should be killed, and the other is that Liu Bei should not be killed. Guo Jia's attitude is recorded in the reflection? 6? 1 Guo Jiachuan Pei Songzhi's note, Pei Songzhi tied for Guo Jia's two opinions. The first one was in Shu Wei, saying that Cao Cao went to Guo Jia, saying that now everyone says that this guy Liu Bei is not a good man, and he must be trying to make trouble with me. what do you think? Guo Jia said, Gong Ming, what makes you take a three-foot sword, rebel and punish severely? Honesty, you got here by being honest with others. Now a hero Liu Bei is desperate to come to us. What would the world think if we killed him? Therefore, Guo Jia said, you can't kill people casually: "One person's suffering is the hope of the world. Please be careful. " Another record is "Fu Zi". This book says that Cao Cao released Liu Bei. Guo Jia hurried to Cao Cao and said that Liu Bei could not be released because he was a hero. He is sure that he will make some noise when he is released. Guo Jia said: "If you resist the enemy for one day, you will suffer from it." After the enemy is released, there will be endless troubles. Gong Ming, you should have made arrangements earlier. That is to say, someone wanted to kill Liu Bei, Guo Jia said he couldn't kill him, and someone said he wanted Liu Bei and Guo Jia to say they couldn't kill him, so Pei Songzhi noted that these two were opposites. Actually, it's not the opposite, it's the same. Why do you say that? Guo Jia never said that he would kill Liu Bei, and Guo Jia said "sooner rather than later", that is, Liu Bei must make arrangements as early as possible, and arrangement does not mean killing. I agree with Mr. Zhou Zexiong on this issue. Mr. Zhou Zexiong said that Guo Jia's proposition can neither be killed nor released. What should I do? House arrest, if you put him under house arrest, you won't lose people's hearts and let the enemy go. But strangely, Cao Cao didn't seem to understand this time. Maybe it's too sensitive. Guo Jia said bluntly, nor did he say the word house arrest. He just said that you had plans, and Cao Cao didn't know why, so he didn't understand. Of course, even Cao Cao and Guo Jia are human beings, not gods. No matter how unpredictable he is, he can't expect a Zhuge Liang in Longzhong six years later, which he can't calculate. This is not as good as heaven. Yes, it was not until Liu Bei left that Cao Cao discovered that either he loved Liu Bei too much and trusted him too much, or Cao Cao also wanted to destroy Yuan Shu. Of course, in order to collect Liu Bei, Cao Cao took a risky move, betting on Liu Bei just to help him reduce an opponent, but if Liu Bei can be used for himself, it will not only lose an opponent, but also gain a helper! Of course, Cao Cao misjudged Liu Bei, and the wrong estimation naturally made him suffer, but if Liu Bei really came back, then. . . Guo Jia warned Cao Cao, but he wouldn't listen. He can only say that Cao Cao loves talents.