Why is Sima Rui called Niu Rui?

Sima Rui was nicknamed Niu Rui by the world because some historical books recorded that he was not a bloodline of the Sima royal family, but that his mother had an affair with a minor official named Niu Jin in the mansion. Only then did he give birth to Sima Rui.

But what needs to be clarified here is that this minor official in the government was not the general Niu Jin who made great contributions at that time. In other words, they just had the same name. When Cao Wei was founded, General Niu Jin was Sima Yi's subordinate, and Niu Jin won many battles.

Many people who don’t understand say that Sima Rui is Sima Yi’s great-grandson, but in terms of blood relationship, Sima Rui is not Sima Yi’s biological grandson, so Sima Rui is called Niu Rui.

It is said that there was a book circulating at that time, which recorded the prophecy that "the ox will succeed the horse". Sima Yi felt uneasy after hearing this prophecy, so he asked a master to observe the sky at night and perform divination, and the results he obtained were exactly as predicted. Therefore, Sima Yi was very worried that Niu Jin in the court would be detrimental to the Sima family. He always had a knot in his heart, which made him fearful and troublesome. In order to prevent such incidents from happening, he decided to get rid of Niu Jin. Therefore, he sent someone to invite Niu Jin to a banquet. Niu Jin was an upright and aboveboard man and did not watch out for Sima Yi. Unexpectedly, he drank the wine poisoned by Sima Yi and died from the poison.

After Niu Jin died, Sima Yi finally recovered from his heart disease. However, fate is not as good as fate. At that time, Sima Rui's mother had an improper relationship with a minor official named Niu Jin who was on duty in the mansion. Later, Sima Rui was nicknamed Niu Rui. Therefore, the death of General Niu Jin was purely unjust. At the same time, this prophecy also became true. Sima Rui was not of the Sima family's blood, but he founded the Eastern Jin Dynasty with the Sima family's blood. Therefore, Sima Rui was also called Niu Rui, and even the Eastern Jin Dynasty he founded was called the "Southern Dynasties Jin Niu" "