First, the historical background story happened after Battle of Red Cliffs, when the world basically belonged to Sun Quan and Cao Cao, and Liu Bei was just a little general. Battle of Red Cliffs, because Cao Cao's soldiers were not good at water warfare, and were infected with the plague at that time, was attacked by Zhou Yu and was defeated in the end. Cao Cao suffered heavy losses, but most of Jingzhou's land is still in his hands. After that, Sun Quan and Liu Bei carved up the rest of Jingzhou territory. Because of the huge difference in strength between the two sides, Sun Quan occupied most of the advantages, and Liu Bei had no room for development. At this time, he had to face the pressure of Cao Cao, so Liu Bei borrowed Jingzhou from Sun Quan.
Second, borrowing Jingzhou is a historical fable that Liu Bei borrowed Jingzhou and did not return it. In fact, Liu Bei returned it. At that time, Liu Bei borrowed Jingzhou from Sun Quan, who considered various reasons. He thinks that the enemy should unite against Cao Cao's army at present. Cao Cao appreciates such foresight. Later, Liu Bei went to Liangzhou, but he still didn't return it to Sun Quan. Liu Bei violated the original agreement. Originally, the two sides decided to fight to the death, but they heard that Cao Cao personally led the troops to crusade against Hanzhong. In this case, the two sides chose to reach a settlement, and finally Liu Bei returned to Jingzhou.
Judging from the fact that Liu Bei borrowed Jingzhou, it shows that Sun Quan is brilliant, good at using Liu Bei's reputation and power, and finally resisted the powerful enemy Cao Cao. But when he developed and wanted to go back to Jingzhou, he was rejected, which showed his foresight. Although he wanted to fight to the death at first, he was not carried away by anger, but saw the pattern and knew that he could not be willful. In the end, he chose to reconcile with Liu Bei instead of retaking Jingzhou by force.