Literature Reference: 印封龟纽知颁爵，冠饰蝉緌更珥貂。—— 《初秋忽奉诏除浙东观察使检校右貂》 The seal is stamped with the turtle knob, signifying the conferral of titles, while the crown is adorned with cicada tassels and sable pendants. Source from 'Chu Qiu Hu Feng Zhao Chu Zhe Dong Guan Cha Shi Jian Xiao You Diao'.
龟:
The turtle symbolizes longevity, health, and good fortune in Chinese culture.
纽: Hub, bond. When used as a personal name, it often depicts a person of great capability, holding a pivotal position.
Meaning: The turtle knob symbolizes nobility and authority, often used in ancient official seals, representing high status and stable power.