Literature Reference: 九天丈人之宝书。—— 《金珰玉珮歌》 The precious book of the Nine Heavens' Elder. Source from 'Jin Dang Yu Pei Ge'.
宝: The character "宝" originally served as a general term for jade artifacts, later extending to denote all manner of precious items. In names, it often conveys a sense of nobility and rarity.
书: Books, repositories of knowledge, embody wisdom. They express art and literature, convey profound thoughts, facilitate emotional expression, and are adorned with literary elegance.
Meaning: The term 'Precious Book' symbolizes invaluable and sacred knowledge, signifying wisdom and excellence, often used to describe rare and significant texts.