The emperor chooses his name, is it a title or the emperor's name?

Only one emperor named himself in history, and Wu Zetian named himself Chang. As the only female emperor in the history of China, this phenomenon is not universal and has no discussion value.

Moreover, for example, Qianlong named himself the old man, which is not the title of emperor, but a self-summary like a layman.

In short, it is rare for the emperor to clear his name, so it is impossible to generalize.