Speaking of his younger brother, Sima Yan is actually very alert. In the Western Jin Dynasty, Sima You was made King of Qi. He is kind-hearted and friendly, and has won the support of all officials. In fact, this is just one reason. Most importantly, his younger brother was adopted by Si Mazhao to his older brother Sima Shi, who was very kind to Si Mazhao. Therefore, when Sima Yan was a prince, he often heard Si Mazhao say that he would repay his brother, and Si Mazhao was particularly optimistic about his brother, which also made him feel uneasy.
So when officials recommended Sima You to establish a prince, Sima Yan also had this idea, but then on second thought, he thought it was wrong and would definitely have an impact on him, so he dismissed the idea. Not only that, he also wanted to drive Sima You out of Beijing and let him go to other places. Sima You naturally wouldn't agree, so he lied that he was sick, and Sima Yi was not easy to cheat. He immediately called the doctor to treat him too much. Cure too much must be biased towards the emperor.
In fact, there is another reason why Sima Zhong gave the throne to this stupid son. Although Sima Zhong is stupid, his son is very clever. If you pass the throne to him, you will also give it to his grandson in the future, so Sima Yan has been playing this wishful thinking, but what he never expected was that Jia Nanfeng, the ugly wife around Sima Zhong, would make waves, leading to the chaos of the eight kings.