Because the Xie family and Wang family have always been prominent families, they helped Sima Yi seize power during his period, and helped him consolidate his position during the Eastern Jin Dynasty.

The reason why the Northern Sima family was able to overthrow the Cao family's rule mainly relied on the support of the northern aristocratic families. Among them, the four major families, headed by the Wang family of Langya, the Xie family of Chenjun, the Yu family of Yingchuan, and the Wang family of Taiyuan, stood up to support the Sima family during Sima Yi's seizure of power.

The Wang Xie family was a well-known name in the Wei, Jin, Southern and Northern Dynasties. Even in the Eastern Jin Dynasty when there were many families, the Wang Xie family regarded themselves very highly. Except for entering the palace to climb the dragon and the phoenix, marriages were only between the two families. carried out within.

After the demise of the Jin Dynasty, the two families continued to be prosperous. It was not until Emperor Wu of Liang Dynasty that the great lord Hou Jing proposed to the two clans and was rejected. He regarded this as a life-long regret, and in the end, he killed the king when he rebelled. The two clans were completely exterminated, and Wang Xie's romantic relationship for several generations came to an abrupt end.

Extended information:

After Emperor Min of the Western Jin Dynasty was captured, Sima Rui proclaimed himself emperor in 318 with the support of Jin's nobles and powerful families, that is, the throne. After he ascended the throne, due to his insufficient reputation and weak power among the royal family, he did not receive support from the northern and southern nobles, and the throne was unstable.

But he reused Wang Dao. Wang Dao made the southern nobles support Sima Rui, and also made the northern nobles who moved south support Sima Rui, thereby stabilizing the Eastern Jin Dynasty and maintaining peace in Jiangdong.

Sima Rui was very grateful to Director Wang and appointed him as prime minister to take charge of the government. People at that time said that the king and his horse ruled the world. The Eastern Jin Dynasty was the heyday of the development of clan politics, and its most significant feature was the decline of imperial power. The powerful families such as Wang, Xie, Yu and Huan successively dominated the Eastern Jin Dynasty.

Reference: Baidu Encyclopedia-Four Major Families