In old China, there were many rules about names and who could use them. People used boys' real names but, when they became men at age 20, only older members of their families could call them that. Other people used a special courtesy name to be polite. When he became a man, Zhu Chongba chose the name Xīngzōng, meaning that he wanted to bring success in honor of his dead family members. This name is written in the traditional writing used on Taiwan and Hong Kong and in the easier writing now used by the PRC. When he started to become a successful leader, he started to use a third name: . This name is written in Chinese writing. He also sometimes used the courtesy name Guóruì, meaning "National Luckiness".