Hello, the emperors of the Ming Dynasty, starting from the grandson of Zhu Yuanzhang, all had three-character names. The middle one was uniformly stipulated by Zhu Yuanzhang himself, and the third one was started with the radicals of metal, wood, water, fire, and earth based on the five elements. . For example: Zhu Di's lineage, Zhu Gaochi, Zhu Gaoxu, Zhu Gaosui, the second character "Gao" is specified by Zhu Yuanzhang, and the third character is next to the character for fire. But later, Zhu Yuanzhang's descendants became more and more numerous, so characters with five elements radicals were no longer enough, and officials simply created new characters to name them.