In 198 AD, Liu Bei and Cao Cao went out together to attack Lü Bu, who occupied Xia Pi, and after several months of siege, Lü Bu's generals saw that there was no possibility of victory, so they surrendered to Cao Cao, and Lü Bu could only go out of the city to surrender, and was subsequently killed by Cao Cao. After this, Liu Bei returned to Xudu with Guan Yu, Zhang Fei and others with Cao Cao, and Cao Cao appointed Che Ji as the Assassin of Xuzhou and sat in Xuzhou. At the time of Xu Capital, Liu Bei was involved in the Yidai Zhao incident, but because Cao Cao was always jealous of Liu Bei, just as Yuan Shu was going north to defect to Yuan Shao, Cao Cao ordered Liu Bei and Zhu Ling to lead an army to block Yuan Shu. However, when the march reached the halfway point, Yuan Shu had already died, and Liu Bei attacked and killed Che In Xuzhou and occupied Xuzhou, in order to better guard against Xuzhou, Liu Bei let Guan Yu sit in Xia Pi.
On the eve of the Battle of Guandu, in order to get rid of Liu Bei's confidant and avoid being attacked by the enemy, Cao Cao personally led a large army to attack Xuzhou, at that time Liu Bei and Guan Yu could not resist Cao Cao's attack, so Liu Bei was defeated and fled, and Guan Yu was captured by Cao Cao and surrendered to Cao Cao. It was only after Guan Yu later killed Yan Liang, lifted the siege of the white horse, and rode alone to meet Liu Bei after that, and then returned to Liu Bei's side again. However, from the defeat of xuzhou to the encounter in the ancient city, the Romance of the Three Kingdoms and the Romance of the Three Kingdoms never mentionEd Liu Bei's views or ideas on Guan Yu's behavior during this period. So what was Liu Bei's attitude towards the fact that Guan Yu surrendered to Cao Cao after the fall of Xuzhou?
Historically, Guan Yu surrendered to Cao Cao in order to protect Liu Bei's wife, and after that, Guan Yu returned to Liu Bei's side again, so Liu Bei would never resent Guan Yu, but would be very touched by Guan Yu's behavior. Do you know that Lady Gan was a person who followed Liu Bei during the Xiao Pei period, and when Liu Bei defeated Xiao Pei and defected to Yuan Shao, Cao Cao captured Liu Bei's wife, including Lady Gan, without Guan Yu's protection, Lady Gan would never have been able to follow Liu Bei to Nan Commandery later, and eventually died in Nan County?
What's more, in the Eastern Han Dynasty, Guan Yu did not forget Liu Bei, protected his family, and also repaid Cao Cao, which was universally praised at that time, although in the "Romance of the Three Kingdoms", Guan Yu's passing five levels and cutting six would be fictional, but there was still a prototype for protecting his sister-in-law, so Guan Yu was blameless in both practice and result, and for Liu Bei, he should feel fortunate.
The author believes that Liu Bei later used Guan Yu very much, not only letting him sit in Jingzhou, but also making him a former general, and even preparing the title of general for Guan Yu, which shows that Liu Bei has no grudge against Guan Yu and naturally has no resentment towards Guan Yu's surrender to Cao Cao.