Literature Reference: The nine delicate lamps spin dazzlingly, while the seven treasures curtain glitters brilliantly. Source from 'Pei Changshi's Poem on the Rose Trellis'.
七: The number seven, the Big Dipper.
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.
Meaning: Seven treasures symbolize precious, rare, and dazzling things, representing value, beauty, and brilliance.