Cao Pi said to Cao Zhi, "If you don't accept the title of king, I will accompany you to travel in clothes." Is xelloss really determined, or is it just grandstanding?

Is this a threat? Imagine that if an emperor is too harsh on his brother, people will say that he can't tolerate others, and Cao Zhi knows from history that he is also a proud Lord. He could have become an emperor, but he was given only a king. He is probably in a bad mood and doesn't accept it, which implements Cao Pi's theory of intolerance. So he threatened Cao Zhi that if you don't accept the title of king, I won't be emperor. Imagine that Cao Pi is not an emperor. Can his men from the dragon be content? I will definitely find a way to kill Cao Zhi. That's why I think it's a threat rather than a sensation, because their brother relationship has always been bad. If an enemy puts you in front of you and plays with emotion, you must want to slap him instead of being moved. . . .