In Romance of the Three Kingdoms, why did Sun Ce kill Yu Ji?

The main reason why Sun Ce insisted on killing concubine Yu was that her existence seriously affected Sun Ce's position. As for some of the reasons, let's talk briefly.

First of all, with the help of the strength left by his father, Sun Ce, who has completed the control of Jiangdong, thinks that his influence is the first. When he saw that Yu Ji's influence exceeded his own, his heart would inevitably feel lost and afraid. Based on the principle that two tigers can't be killed in one mountain, Sun Ce can't stay in Kyrgyzstan. Sun Ce did not simply inherit his father Sun Jian's legacy. He actually went through many wars and made many military achievements. In addition, he mastered the power of Jiangdong at a young age and should maintain his authority. Yu Ji's prestige among the people even surpassed that of Sun Ce, because he helped the people all the year round. As the ruling class, Sun Ce is naturally afraid of people like Yu Ji.

Secondly, as a common people without real power, Yu Ji didn't show his obedience and loyalty to Sun Ce for the first time after Sun Ce, so in order to maintain his position, Sun Ce could not let Yu Ji go. May be the reason why he has been sought after by believers for a long time, plus he is very old, so Yu Ji became more arrogant after seeing Sun Ce. Sun Ce, who won respect on the battlefield, naturally disliked Yu Ji, a warlock who was both civil and military. You know, at the end of the Eastern Han Dynasty, it was the same opening angle as Yu Ji, so for the sake of the internal stability and unity of Sun Wu, Sun Ce could not tolerate such a character as Yu Ji.

Finally, Sun Ce and Yu Ji have different beliefs. If you don't like each other, you naturally have the strength to destroy the one who has no strength. Although it is a good thing that Yu Ji can help the people, he only believes in ghosts and gods. Sun Ce, who has always been headstrong and doesn't believe in ghosts and gods, naturally doesn't like Yu Ji's method, and he doesn't want Jiangdong people to be bewitched by Yu Ji and let them do whatever they want. Therefore, in the case of disparity in strength between the two sides, Sun Ce naturally wanted to kill Yu Ji to consolidate his rule.