The era of unification after the establishment of the Three Kingdoms was the Western Jin Dynasty, and the founder of the Western Jin Dynasty was Sima Yan, the Emperor of jinwu, but the foundation of the Jin Dynasty was laid by Sima Yi. Sima Yi was a chancellor of the State of Wei, and after he killed the Cao Wei general Cao Shuang, the power of the State of Wei fell into the hands of Sima Shi.

Cao Shuang was a general of Cao Wei, and his father Cao Zhen was Cao Cao's adopted son. Cao Shuang was a typical magnate who succeeded in ascending to the throne by birth, he originally had no talent to learn, and it was only natural that he would lose at the hands of Sima Yi.
Although Cao Shuang was a straw bag, he represented the Cao Wei Sect Chamber. Cao Shuang's death meant that Cao Wei's power would fall into the hands of foreigners, but Sima Yi did not encounter any resistance from Cao's clan relatives after seizing power? Were these Cao clan relatives willing to surrender their power to Sima Yi?
In fact, after Sima Yi killed Cao Shuang, the Cao clan relatives should have dared to be angry and did not dare to speak. why? Because these Cao clan relatives did not have the strength to confront Sima Yi. The reason for this situation is that it starts with Cao Pi, the founding monarch who established the State of Wei.
<h1 class="pgc-h-arrow-right" > seizures</h1>
Cao Pi was Cao Cao's eldest son, but Cao Cao did not establish the status of Cao Pi's son (世子, the heir of the prince) for a long time after becoming king of Wei. This was because cao cao's other son, Cao Zhi, was so talented and loved by Cao Cao that Cao Cao hesitated on the question of whether to make Cao Pi the son of the world or to make Cao Zhi the son of the world.
Cao Cao's hesitant attitude towards Cao Pi and Cao Zhi formed a contest between the two major conquest groups with these two brothers as the core. At that time, Cao Zhi was assisted by Yang Xiu, Ding Yi and others, and almost made Cao Zhi a shizi. Later, Cao Zhi's position in Cao Cao's heart plummeted because of his drinking mistakes, and at that time, Jia Xu also reminded Cao Cao not to forget the lessons of Liu Biao and Yuan Shao (both of whom were in the same room because of the abolition of Chang Liyou). After some deliberation, Cao Cao finally established Cao Pi as his son.
Zhi is different from talent, and Ding Yi, Ding Yi, Yang Yu and so on are wings. Taizu fox doubted, a few for the prince of the number of people. Romance of the Three Kingdoms, Book of Wei, Biography of Cao Zhi
<h1 class="pgc-h-arrow-right" > Cao Pi's attitude toward his relatives</h1>
After Cao Cao's death, Cao Pi became king of Wei. Above we mentioned that Cao Cao originally had the idea of establishing Cao Zhi as the son of the world, and on several occasions Cao Cao almost made the decision to make Cao Zhi the son of the world. From this, we can know that Cao Pi was able to become the king of Wei, which was also a bit of a fluke factor.
The rivalry between Cao Pi and Cao Zhi made him distrustful of his clan relatives. After he became the King of Wei, the first thing he did was to rectify his brothers.
Cao Zhi's henchmen were mainly Yang Xiu, Ding Yi and Ding Yi. Yang Xiu was killed by Cao Cao while Cao Cao was alive, and cao Pi immediately killed Ding Yi and Ding Yi after becoming king of Wei. After removing Cao Zhi's henchmen, Cao Pi expelled Cao Zhi and other princes from the capital and sent them to their own fiefdoms.
Emperor Wen took the throne, with Ding Yi, Ding Yi, and his male mouth. Planted with the princes and established the kingdom. Romance of the Three Kingdoms, Book of Wei, Biography of Cao Zhi
In addition to Cao Zhi, Cao Pi was also jealous of another brother, Cao Zhang. Cao Zhang's fate, like Cao Zhi's, was also suspected after Cao Pi became king of Wei. Both Cao Zhang and Cao Zhi were expelled from the center of power by Cao Pi and exiled to the princely states. Some people will certainly say that in the princely states is not more at ease in the princely states than in the imperial court? According to common sense, this is the case, but cao Pi arranged his brothers in the princely states for the purpose of letting his brothers get away with it.
We can take Cao Zhi as an example to know what the treatment of the princes at that time was. At that time, in order to guard against his brothers, Cao Pi deliberately equipped them with incompetent people as subordinates, and the subordinates of the princes were all old, weak, sick and disabled. Cao Zhi had offended Cao Pi before, and Cao Pi even halved his personnel. In order to prevent Cao Zhi from cultivating power in the local area, Cao Pi also changed Cao Zhi's fiefdom several times.
When the legal system was in place, the kingdom of the domain was self-imposed, and the subordinates were all jia shu, and the soldiers gave them the remnants of the elderly, most of whom were no more than two hundred. Planted again before, everything was halved, and in eleven years and three migrations, often drew no joy, and then became ill, and was forty-one years old. Romance of the Three Kingdoms, Book of Wei, Biography of Cao Zhi
Cao Pi's attitude towards the king of the clan also influenced his heir Cao Rui. After Cao Pi's death, Cao Zhi repeatedly asked the Wei Ming Emperor Cao Rui to be entrusted with important duties by the imperial court. But Cao Rui, the uncle, did not have the slightest pity and ignored Cao Zhi's request. Just imagine, even the clan relatives such as Cao Zhi and Cao Zhang are not trusted and treated, and the treatment of other Cao clan relatives can be imagined.
Even Chen Shou, the author of the Romance of the Three Kingdoms, commented on the cao princes with deep sympathy: "The princes of the State of Wei are all vain names and have no real power. ”
The prince of the Wei clan, who has the name of the land in vain, but also has no social principle, and is forbidden to guard against the barrier, the same as the prison; the title is fixed, the size is easy; the flesh and bones are obedient, and the righteousness of the constant di is abolished. Romance of the Three Kingdoms, Book of Wei, Biography of Prince Wu Wenshi