Literature Reference: 绝代有佳人，幽居在空谷。——《佳人》 杜甫 A peerless beauty dwells in seclusion within an empty valley. Source from 'The Beauty' by Du Fu.
空: The heavens, the expanse.
谷: Surname, the essence of sustenance.
Meaning: An empty valley symbolizes depth, tranquility, and a realm beyond worldly concerns, representing profound purity.