It should be beauty+grinding beauty. Nanzhu is the sea pearl queen of China. Qu Dajun, a famous scholar in Ming Dynasty, first called Hepu Pearl Nanzhu. In his Guangdong New Language, it was recorded: "Hepu Pearl is called Nanzhu, its westerners are called Zhu Xi, its westerners are called Dongzhu, its beans are blue and white, and its luster is not as good as that of Zhu Xi, and Zhu Xi is not as good as that of Nanzhu."