As the old saying goes, "When is the retribution for wrongs?" "After the parents are killed, the son wants to avenge the parents and then kill the enemy. After the death of the enemy, the son of the enemy begins to take revenge again, and so on. There are not a few such tragedies in history, and this is an understandable act from the perspective of filial piety. Revenge is to prevent the descendants of the enemy from taking revenge on them, so they often destroy the door and kill the whole family, so that they can cut the grass and remove the roots, so as to avoid future troubles.

In 263 AD, Deng Ai smuggled himself into Yinping and took Chengdu directly. Liu Chan was incompetent and could only surrender, and the Shu state came to an end. As emperor, Liu Chan was naturally welcomed by Sima Zhao, and after coming to the State of Wei, he was given the title of "Duke of Anle" and continued to maintain a good life. However, the rest of the Shu Han courtiers were not treated favorably by Sima Zhao, and some were directly killed. The most tragic of these was Guan Yu, whose entire family had been killed.
In the Chronicle of the Three Kingdoms, it is recorded that "The Pang Dezihui, along with Chung and Deng Fa Shu, Shu broke, and destroyed the Guan family." "Pang De's son Pang Would destroy Guan Yu's family after the fall of the Shu kingdom, because he wanted revenge. During the Battle of Fancheng, Guan Yu persuaded Pound to surrender, but Pound did not surrender, so Guan Yu killed Pound. Pang will hear the news and is determined to avenge his father in this life. A few years later, Pang would kill Guan Yu's entire family. The Shu Han courtiers were also slaughtered and miserable.
One of them is more special, he is Zhang Fei. Zhang Fei's family was not killed by Wei Jun, and they were at peace. This is related to Zhang Fei's identity, he is not a simple person. Zhang Fei's two daughters were Empress Liu Chan, and he was Liu Chan's father-in-law. In addition, Zhang Fei is Liu Bei's third brother, and he is Liu Chan's third uncle. Various phenomena show that the relationship between Zhang Fei and Liu Chan is not ordinary, and they are relatives of the emperor and the state. He was not only an imperial relative of the Shu state, but also an imperial relative of the State of Wei.
Who is your third brother's wife? Amazing! Zhang Fei's wife was Xiahou Shi, the niece of the Wei general Xiahou Yuan, and the sister of Xiahou Chun, who was related to the Wei state. Zhang Fei's descendants were also related to Wei Guozhan and were all connected by blood. Although the State of Wei was under the control of Sima Shi at this time, the Xiahou Clan was still there, and zhang Fei could not move on his side. Liu Chan was also alive, and he definitely didn't want anything to happen to his father-in-law's descendants.
In summary, due to Zhang Fei's special status, his family was saved. And Guan Yu's family was killed because Pang would avenge his father, and this disparity is really impressive! In fact, Zhang Fei is not a big man with a beard, but a beautiful man, and history needs to be read carefully!