Zhuge Liang's death was a far-reaching event in the history of the Shu Han Dynasty. This brought about a major adjustment in the internal official system of the Shu Han Dynasty. Originally, when Zhuge Liang was alive, shu Han only had a chancellor and no great general. After Zhuge Liang's death, Liu Chan made Jiang Huan a great general, but from then until the fall of the Shu Han Dynasty, Liu Chan never established the position of chancellor again.
Why is that?
Let's first look at the position of General. During the Three Kingdoms period, the Great General was equivalent to the Grand Marshal of The Terracotta Army, and was in charge of the military department. When Liu Bei became emperor, Guan Yu, who was most qualified to serve as a great general, had already died. After Guan Yu's death, there were no generals in the Shu Han army who had the ability to serve as a general, which can be seen when Liu Bei became the general of the Five Tigers of Hanzhong, when Liu Bei was crowned as a general of the four sides before and after, and Guan Yu was a former general with the highest status.
Guan Yu's death can be said to be a key reason why the Shu Han did not set up a great general. Coupled with the fact that Liu Bei and Zhuge Liang were themselves military commanders, in this case, whether there was a great general had little impact on Shu Han, and if one of the remaining four tiger generals had to be selected as a great general, it was estimated that unnecessary contradictions would be triggered.
The position of chancellor was no longer established after Zhuge Liang's death, which was actually the same as Guan Yu's reason. After Zhuge Liang was entrusted with the White Emperor's city, he grasped the administrative and military affairs of Shu Han with one hand, and bowed down to death. Moreover, Zhuge Liang was Liu Chan's sub-father, and no matter in terms of status or generation, only Zhuge Liang could serve as a chancellor and be in charge of the military and political power of Shu Han. And Zhuge Liang has become a model as a minister, once someone else is set up as a minister, then does this person also want to be arrested by the military, government, and civil affairs? Obviously, Shu Han did not have such a character. Moreover, Liu Chan was not really stupid, the position of the prime minister was a great restriction on himself, and he would never shackle himself again.
Therefore, after Zhuge Liang's death, the system of the Shu Han Changed from the general administration of the Chancellor to the split management of the Great Sima and the Great General, one in charge of the imperial government, the other in charge of the military and the government, and the two sides restrained each other. It was also under such a system that Shu Han spent more than 20 years smoothly after Zhuge Liang's death.