Soon after Cao Cao's death in 220 AD, Cao Pi forced Emperor Xian of Han to give up the throne, at this time the Cao Wei regime completely replaced the Eastern Han regime, Cao Pi also pretended to be the Duke of Shanyang, he could move freely in the shanyang field, so why did Liu Bei, who had been under the banner of restoring the Han Dynasty, not welcome Liu Xie to be called emperor? Instead, he became emperor himself.
People are selfish, Liu Bei, as a tyrant in the chaotic world, he hopes to use the orthodox name of the Han Dynasty to fight for himself. The court of the Great Han Dynasty had already existed in name only, and even if Liu Bei wanted the Great Han to continue the state, he would succeed to the throne in his own name, rather than hoping for Emperor Xian of Han, who was under the control of Cao Wei. Therefore, Liu Bei would not welcome emperor Xian of Han into Sichuan!
Liu Bei called the heart of the emperor, Fei Shi did not understand it, he once said to Liu Bei: "The reason why the lord raised an army was because the son of heaven was taken hostage by Cao Cao, and now that Cao Cao has not yet been destroyed, the lord is anxious to claim the title of emperor, it seems that there is something wrong." Liu Bei's opposition to Fei Shi was very angry at the time, but he did not show it on the spot because of his affection. However, the next thing proved Liu Bei's dissatisfaction with Fei Shi, Liu Bei demoted Fei Shi to Yongchang, Yunnan, Yongchang at that time was very desolate, people who went were generally difficult to survive, Liu Bei's intentions were obvious, if someone prevented me from ascending the throne and becoming emperor, Fei Shi was your end. However, most people understood Liu Bei's thoughts, and Zhuge Liang understood even more.
Secondly, if Emperor Xian gave in and Liu Bei openly asked Cao Pi to return to Chengdu, emperor Xian would undoubtedly die. At this time, regardless of whether Emperor Xiandi was alive or dead, Liu Bei could only stay still in Chengdu, and acknowledging the fait accompli was the best way to save Emperor Xian.
Liu Bei's title as emperor must be based on the premise that Emperor Xian of Han was dead, but his imperial name was not justified. Cao Pi's title as emperor must be based on the premise of Emperor Xian of Han, and Cao Pi must also give preferential treatment to Emperor Xian of Han in order to appear justified. Therefore, after his abdication, the real enemy of Emperor Xiandi of Han was no longer Cao Pi, but Liu Bei. Liu Bei welcomed him into Shu? Not to mention whether he can or not, Liu Bei would not send someone to assassinate Emperor Xian of Han! The new version of "Three Kingdoms" says that Emperor Xian of Han committed suicide, which is really for Liu Bei' honor...