Although they occupied different sites at that time, in the end they fought for Xuzhou, which led to their disagreement.
Yuan Shu has always regarded Liu Bei as a straw. After Liu Bei occupied Xuzhou, Yuan Shu said to the outside that I have never heard of Liu Bei's name since I was born. Although it seems that Liu Bei and Yuan Shu have never dealt with each other, they have never provoked each other.
Yuan Shu is a noble family constantly chauffeured and lived a luxurious life since he was a child, while Liu Bei, who came from a poor family, continued to make a living by selling straw sandals in his twenties. On the whole, Yuan Shu entered the official career smoothly, and he could become a senior official without much struggle, but Liu Bei could only struggle with a group of brothers and slowly embarked on the road of power struggle.
Later, they didn't really have much in common. Liu Bei mainly developed to the north, while Yuan Shu was rooted in the south. Because Liu Bei was courageous, adventurous and willing to endure hardships, he was unlucky. The road to the uprising was always bumpy, while Yuan Shu developed in the south, and with the help of his men, his territory grew bigger and bigger, and his fame gradually increased.
What really turned them against each other was that Tao Qian gave Xuzhou to Liu Bei, which was the greatest piece of dumb luck that Liu Bei stepped on. Later, Liu Bei took root in Xuzhou, and Yuan Shu took root in Yangzhou. They had nothing to do with each other, but they became neighbors because of the transformation of the city. At this time, Yuan Shu was dissatisfied.
After all, he zoned Xuzhou to his own territory a long time ago, but he failed to win Xuzhou. Although Yuan Shu had become the representative of the imperial court in the southeast at that time, he never expected that a little Liu Bei would take Xuzhou, which he had been afraid of for a long time, into his pocket because Yuan Shu always thought highly of himself and ignored others. So Yuan Shu slapped his face and was very angry, so he said that he didn't know there was Liu Bei in the world.
Originally, Liu Bei wanted to avoid a confrontation with Yuan Shu, but because a Confucian scholar stopped him, he let him know that the present opportunity is very rare. Although unpredictable risks are also very important, if he gave up this opportunity, he might give up the opportunity to compete for the world. Even if he gave in, he could not avoid a collision with Yuan Shu. After all, people can't help themselves in the Jianghu.
It is precisely because this change of ownership in Xuzhou is a great event for all camps, and it is also precisely because this change of ownership in Xuzhou has led to a sudden increase in his territory and his influence. Many people are attached to him. After all, you may not have friends, but you will definitely have enemies. At this juncture, more friends means less enemies. Finally, Liu Bei took Xuzhou to take refuge in Yuan Shao's camp.
As a result, Liu Bei had an alliance plan, but he didn't think of Yuan Shu's side. He was ready to attack Xuzhou, and Yuan Shu said he would do it. I wanted to oust Liu Bei before he reacted, and finally the two fought. In Cao Cao's eyes, Liu Bei became a reliable force, and Cao Cao became Liu Bei's backing. In the end, both of them lost.
That's why Yuan Shu always has a hard time with Liu Bei.