Guan Yu defeated Maicheng.
In Romance of the Three Kingdoms, Guan Yu, Liu Bei and Zhang Fei are the brothers of the three outstanding men in Taoyuan and the core of Shu Han, so they have a good relationship. Guan Yu and Zhang Fei have been fighting for Liu Bei's inheritance right. Guan Yu is the god of war. Chopped countless enemies with the Dragon Crescent Moon Knife, but Guan Yu was defeated by the alliance of Cao Cao and Sun Quan because he was too arrogant. At this time, Guan Yu once asked Liu Feng for help, but Liu Feng didn't respond to him. This is a foreshadowing and fuse that he was later killed by Liu Bei.
High work covers the Lord.
After Liu Feng didn't rescue Guan Yu and Guan Yu was killed, Liu Bei didn't kill Liu Feng according to his own principle of benevolence and righteousness at this time, but hesitated to do with him. At this time, a general named Meng Da in Liu Feng's camp chose to defect, which made Liu Feng's impression in Liu Bei's heart even worse. And Liu Feng himself is a very brave and strong person. If he grows up, he is likely to pose a great threat to Shu Han.
Shu Han changed hands.
Liu Feng himself is also a threat to Liu Chan. Liu Chan, the son of Liu Bei, is called "Adou who can't afford it", while Liu Feng is only the son of Liu Bei. Two people are not related by blood. After Liu Bei's death, Liu Chan can only inherit the family business, but Liu Chan's talent is fundamentally different from Liu Feng's. No one can guarantee that after Liu Bei's death, Liu Feng has no intention to replace him. With this in mind and Zhuge Liang's suggestion, Liu Bei finally killed Liu Feng.