During the Three Kingdoms period, the masses were divided, and various forces were established, in such an era of hegemony, talents could freely choose the ming lord they wanted to surrender, so at that time there were many talented generals who later turned to others, and surrendering at that time was not a shameful thing, just choosing a better path according to their own wishes, such as Zhang Liao, one of cao cao's five sons.

Being captured does not mean that the strength is poor, even the fierce general Guan Yu at that time, was also captured by Cao Cao, after all, Cao Cao is a general in hand, he will certainly not let go easily, so Guan Yu just surrendered, Cao Cao named him a partial general, but we all know the story of Taoyuan Sanjieyi, Guan Yu and Liu Bei have a deep friendship, even if Cao Cao is richly treated, Guan Yu still thinks of Liu Bei in his heart.
After Guan Yu killed Yan Liang, Cao Cao also gave him a knighthood and was given the title of Marquis of Hanshouting, although Guan Yu's heart was not for Cao Cao, but he had always used the title given by Cao Cao for the rest of his life, but Liu Bei also treated him well, and there must be a reason for this.
Guan Yu fled because of an incident in his hometown, met Liu Bei and Zhang Fei on the way, and then the three of them formed brothers, and the relationship was good enough to sleep in the same bed, but at the beginning of the division, Liu Bei's power was not strong enough, Guan Yu and Zhang Fei followed him, and later Liu Bei stood in it, but was attacked by Cao Cao, and also captured Guan Yu.
Cao Cao already knew Guan Yu's fame, because Cao Cao was very kind to Guan Yu, so Guan Yu also wanted to repay Cao Cao, when killing Yan Liang, this war was exactly the key battle between Cao Cao and Yuan Shao, Guan Yu thought that he had helped him get this important battle was already a reward for him, so he fled overnight and returned to Liu Bei.
Later, Liu Bei established his own government and gave many officials who followed him a knighthood, Guan Yu as his brother, must not be low in official positions, but in the Eastern Han Dynasty, it was difficult to be knighted, unless there was military merit, cao Cao gave Guan Yu the title of Tinghou, which ranked second among all titles.
Among all the famous generals of the Shu Han Dynasty, Huang Zhong was the Marquis of Guannei, while Zhao Yun was the Marquis of Ting, and although Guan Yu later returned to Liu Bei and founded a new imperial government, his title was really existent, and he also received the Qin zi seal of the imperial court and was officially recognized, which was a difficult thing at that time.
And the new dynasty established by Liu Bei must not be as recognized as high as the Eastern Han In other countries, and the gold content of the Eastern Han Dynasty's Ting Marquis is very high, so it is no wonder that Guan Yu has always regarded himself as such, and another reason is that Guan Yu not only has feelings for Liu Bei, but also has deep feelings for the Han Room.
After Guan Yu was captured by Cao Cao, he had told Cao Cao that what he surrendered was not Cao Ying, but surrendered to the Han Dynasty, and that everything he did was for the prosperity of the Han Chamber, and even when his eldest brother Liu Bei captured Hanzhong and prepared to establish himself as king, Guan Yu also wrote to Liu Bei to admonish him.
This is enough to prove Guan Yu's feelings for the Han Room, and it is precisely because of this that Liu Bei did not begin to claim the title of emperor until after Guan Yu's death, which was because he wanted to take care of Guan Yu's feelings, and later Guan Yu lost Jingzhou, in fact, because he was eager to help the Han Room.
From these aspects, it is also reasonable that Guan Yu attaches so much importance to the title of Marquis of Hanshouting, which reflects his loyalty to the Han Dynasty, and Guan Yu's affection, righteousness, and loyalty have been passed down to future generations, and more than a dozen emperors have also crowned him in later generations.
Until now, there are still many people who "worship Guan Gong", which is to use his spirit of loyalty, so even if Guan Yu is not willing to follow Cao Cao, he still repays Cao Cao's generous treatment, and has always regarded himself as the Marquis of Han Shouting, which also reflects his loyalty to the Han Room, such a loyal person, is regarded as an example by future generations, and now there are GuanDi temples built everywhere to commemorate him.