Should Wei Yan die? People have their own opinions, and there is no need to force uniformity. From the perspective of the integrity and rationality of Luo Lao's story, Wei Yan should die. Its responsibility itself is 80% to 90%. In the Romance of the Three Kingdoms, the antecedents and consequences are written more convincingly. From the handling of this matter, Zhuge Liang's figure can be faintly seen.

In the autumn of 234 AD, Zhuge Liang, who was dying, knew that he would not be able to return to Hanzhong alive, and he prepared for the military after his death. It was decided that Yang Yi would temporarily command the entire army to retreat, while Wei Yan would cut off the rear. Here Zhuge Liang had foreseen that Wei Yan might disobey the order, and his measure was to minimize the resulting losses as much as possible. As for Wei Yan's later, he returned to the division in advance without authorization and burned the path, almost killing the main force of Yang Yi's Shu army, and openly commanding his troops to attack Yang Yi, resulting in defeat and beheading, which was not foreseen beforehand, Zhuge Liang was not a god. In short, this kind of internal friction dealt a very heavy blow to the Shu state. At that time, did Zhuge Liang have a better way to prevent problems before they happened?
There's no need to flip forward too much. Zhuge Liang is of course not confused about history, and should be more aware of the allusions of the Han Dynasty. When Liu Bang talked about the founding of the country, he said: I have Zhang Liang, who is thousands of miles away in the midst of strategizing; Xiao He, who fills in the country, caresses the people, gives rewards, and does not stop grain; and Han Xin, who has millions of people, will win the battle and will conquer the world. Xiao He and Liu Bang had an affair, Zhang Liang was a nobleman, there was no need to say it again, except for Han Xin. At first, he was just a wandering person, and then he was a stubborn lang, that is, when he arrived under Gao Zu, he was only mixed with a lieutenant to rule the su capital, and there was no way but to slip away. When Xiao Heyue chased after Han Xin and Liu Bang was forced to worship him as a marshal, he found a most fatal problem, Han Xin did not have any qualifications and prestige to serve the public! General Yongti, even the soldiers did not know who he was, so why should he command the troops to fight? Gao Zu was worthy of being the founding prince of the country and had his own methods. Bathe, fast, build an altar, and take the stage to worship the handsome! Put the prestige and power into Han Xin's hands. As the king of Han, he subdued the whole army. Only in the Western Han Dynasty for more than two hundred years.
To see is to believe? In 223 AD, Liu Beibai Emperor Chengguo was isolated. Whether it is sincere or false, one thing cannot be questioned, that is, Shu cannot be given to Wei and Wu, even if the world does not have the surname Liu in the future! Due to the defeat of Yiling, the Shu state was in danger like a goose egg and could no longer withstand any losses. Avoiding internal friction and unity are even more important, and Liu Bei knows this very well. At this time, Zhuge Liang was a minister, and he already had considerable qualifications and prestige, which was enough to convince the public. However, Liu Bei was still not at ease, and publicly instructed Zhuge Liang: If the heir can be supplemented, if he is not talented, the king can take it himself. He also wrote an edict telling his son: Engage with the Beggar, and do as the Father. The honesty of the words of the people who will die and the good deeds have made the people of the Shu Han people unite their hearts. Let Zhuge Liang go all out and have no worries
Zhuge Liang learned it no matter what. Whoever gives the power to, Zhuge Liang already has a candidate in his heart. Jiang Huan was the designated heir to the state in his posthumous life, but Zhuge Liang also knew that Jiang Huan was a Xiao He-style figure. What the unified army needs to fight is Han Xin. Yang Yi and Wei Yan's own shortcomings could not bear this big responsibility. Zhuge Liang's death allowing Yang Yi to command the entire army to retreat was only a stopgap measure. Jiang Wei? It was his choice, so Zhuge Liang used his talents to learn and teach each other. At this time, Jiang Wei, as an escort, had a certain amount of capital and prestige, depending on how Zhuge Liang was promoted. If, like Gao Zu and Emperor Xian, helped him to get on his horse and sent him on a ride, even if Wei Yan was not convinced, the possibility of that kind of internal friction would occur much smaller. When Jiang Wei went north to the Central Plains, if there were Wei Yan and other assistants, he would not be alone. But Zhuge Liang knew but did not do it, what was the reason? Too late? I'm afraid that's not the case. Even Sima Yi and the Shu envoys who talked about heaven guessed that Zhuge Liang did not live long based on a word of food and little trouble, and Kong Ming could not have imagined it.
It was determined by Zhuge Liang's status. The emperor is the empress dowager Liu Chan, and the world is not zhuge family! Zhuge Liang was well aware of the importance of military power, and the gun came out of the political power. Zhuge Liang took charge of the government of a country, monopolized power without dishonoring etiquette, did the work of the king and the people of the country did not doubt, practiced the law strictly and the people were satisfied, and used the people to do their best and did not complain. With an open mind, Wu Hou established a generation of monarchs and masters. But there is no guarantee that others will do the same. Jiang Wei did not do badly later, which showed that Zhuge Liang had considerable eyesight. But Zhuge Liang could not act on behalf of the king, go to the stage to pay homage to the marshal, and entrust the affairs of a country to others. This was something that Liu Chan, the lord of the Shu Kingdom, should have done, but Liu Chan didn't do it! Liu Chan was a magnanimous lord, but not a ming jun. What my ancestors did and what my father taught me was the same thing that I didn't learn. Today we only see Zhuge Liang, who was flapping with a hand-cranked lupine fan, and Kong Mingde at that time was cautious everywhere and thought about it day by day. Zhuge Liang is not an immortal, let alone a god. Rumors of the weekly formula can crush it to pieces! Zhuge Liang, with his sincerity and justice, is worthy of Liu Bei, worthy of the common people, worthy of his family and friends, and worthy of himself, worthy of his life's ambitions. When the experts, after all the circumstances are known, ask themselves, can you do better than Zhuge Liang and send the Shu army home safely?
No mountains, no flat land. Zhuge Liang could not have been a military man or a politician. But just by virtue of his bowing, doing his best, and dying before he succeeds, he can be called Huaxia. The vicissitudes of the wind and rain wash history, Zhuge Wuhou to be an upright, wise, kind person, there will eventually be posterity to hang.