Literature Reference: 玉树阴初正，桐圭影未斜。—— 《奉和咏日午》 The shade of the jade tree is just right, and the shadow of the Tonggui has not yet tilted. Source from 'Fenghe Yongri Wu'.
桐: The phoenix tree, known as "wutong" in Chinese, symbolizes vigorous vitality when used in personal names.
圭: The name of an ancient jade artifact, bearing a homophone to a vulgar term, should be used with caution in naming.
Meaning: Tonggui symbolizes elegance, integrity, and light, embodying the resilience of the paulownia wood and the purity of the jade tablet.