Cao Cao's official residence is the prime minister, and most ministers call him Prime Minister Cao. After Cao Pi usurped the throne, Cao Cao was named Wei Wudi and Wei Taizu, which generally appeared in history books. For example, Cao Cao was called Wei Taizu in the Three Kingdoms. The name Cao Gong is an honorific title. Before Liu Bei became a separatist, Cao Cao was once called Cao Gong. In ancient times, in order to show respect, Cao Cao called people by their first names, just like swearing now; Cao Cao's nickname "Shun" is what his elders call him. Lv Boshe is his dry uncle and used to call him that. I can only explain these. I hope you can adopt it.