Liu Yan's death is not unjust, there is an idiom called "disaster comes out of the mouth", Liu Yan is a typical person who speaks wildly, the history books have recorded Liu Yan's mouth out of the mouth twice, the first time he was lucky not to be seriously punished, he himself also made a profound review, but it is precisely because he was not seriously punished, so there is no profound lesson placed there, so when he speaks wildly again, the result is to abandon the city, that is, what we usually call execution at the mouth of the city.

In fact, Liu Yan's identity is not ordinary. He was the same as Liu Bei, and he had already known Liu Bei as early as when Liu Bei was a pastor in Yuzhou, and the two had a good relationship. He followed Liu Bei's side, which shows that Liu Yan was already the elder of Shu Han. Moreover, Liu Yan is a person who can speak the Tao, has a good literary style, and has an outstanding appearance, and has the style of a famous scholar, and is definitely not an ordinary person.
After Liu Bei's death, Liu Yan was made the Marquis of Duxiang and a general of the Che Riders, which can be said to be a high authority, but there is one point, Liu Yan did not participate in political affairs, he was more often just a foil, following Zhuge Liang's side, doing small things that matched his identity, and the real power of Shu Han was Zhuge Liang. Perhaps this is also Liu Yan's cleverness, low-key in politics, but very high-profile in life, all kinds of pomp and circumstance are readily available, extremely enjoyable, and willing to spend time and money on enjoyment, perhaps this is also a common disease of celebrities.
Although Liu Yan was a very high official, able to speak eloquently and had the style of a famous scholar, in the end he was not broad-minded, and even a little paranoid, which could easily lead to disputes. In 232 BC, Liu Yan and Wei Yan had a conflict, Liu Yan mouthed wild words, absurd, Zhuge Liang was very angry, but also did not hand Liu Yan over to the judicial department for interrogation, but only verbally reprimanded, at that time Liu Yan was still very grateful to Zhuge Liang, he wrote a review to admit his mistake, and thanked Zhuge Liang for not handing him over, he will change in the future, etc., must not let the wine be wrong. He attributed the reason for his wild speech to drinking too much wine, which is obviously not the truth, in fact, he himself admits that people have "mixed opinions" about him, that is to say, many people have long been unaccustomed to him, but liu Yan's identity can not do anything with him.
Of course, in this matter, Zhuge Liang did not have any punishment for Liu Yan, although he did not demote Liu Yan, but he sent Liu Yan back to Chengdu, far away from the political center of Shu Han, such a punishment is actually very light, but Liu Yan is very dissatisfied, he thinks that his identity should not be punished, after all, he himself has also reviewed. However, in order to achieve long-term development, any country or region must have good rules and regulations, and cannot regard the system as nothing. This incident only made Liu Yan dissatisfied with Zhuge Liang, but did not teach Liu Yan enough lessons. Two years later, he made another mistake and directly killed him.
In the first month before Zhuge Liang's last Northern Expedition, that is, in the first month of the 234th year, according to the custom, ministers like Liu Yan would bring their wives into the palace to celebrate the New Year to the empress, and Liu Yan did bring his wife Hu into the palace to meet the empress. Hu's heavenly posture, beautiful face, it is precisely because of her beauty, to Liu Yan brought insecurity, always feel that everyone likes Hu, always think that Hu more than a look at other men may have a private affair with each other, so usually, Liu Yan will look at Hu very tightly.
But in this year's Spring Festival celebration, the empress dowager left the Hu clan in the palace because she wanted to talk to the Hu clan more, and this stay was a month, how could Liu Yan calm down, after all, not only the empress dowager lived in the palace, but also Liu Chan. So when Hu Shi returned home, Liu Yan could not control his inner thoughts, he felt that there must be a private affair between Hu Shi and Liu Chan, he thought of it and asked Hu Shi, Hu Shi naturally could not admit it, but no matter what she said, it could not change the fact that Liu Yan believed in his heart.
When Liu Yan saw that Hu Shi refused to admit it, he let the soldiers around him beat Hu Shi and even used his shoes to smoke Hu s face, but Hu Shi still insisted that nothing had happened, and later Liu Yan had enough beatings, so he drove Hu Shi out of the house with a letter of suspension. Just like this, how can Hu Shi be willing, she will report everything that happened to the imperial court, and then Zhuge Liang ordered someone to investigate and arrestEd Liu Yan.
Zhuge Liang was very heartbroken, he did not expect that Liu Yan was a person who did not change his nature, and dared to say that Liu Chan, the emperor of Shu Han, had an affair with his wife, which was not a simple slander, this was a challenge to the imperial power, even the emperor dared to be wronged, what else did Liu Yan dare not do? He no longer put the imperial power in his eyes, such a person actually has only one way to die, it is impossible to give him a chance to live, so under Zhuge Liang's orders, Liu Yan was abandoned.
Liu Yan's death is actually seriously said to have nothing to do with any court scandal, first of all, Hu and Liu Chan did not have a private affair, this is purely Liu Yan's own thoughts, secondly, even if Liu Chan really forced hu shi, this is not a particularly difficult to tolerate big scandal, after all, it was the Three Kingdoms era, many of the concepts of later generations did not exist at that time, and such a thing did not happen in one or two things. The real cause of Liu Yan's death was his wild speech, and even the emperor dared to pull down his horse. Such a person is still not sure what will happen.