The turtle knob has been used since the Qin State (778–207 BCE) of the Warring States Period for both official and private seals. They were often cast or carved in gold. Sometimes also called a tortoise knob.
- Pinyin: guī niŭ
The turtle knob has been used since the Qin State (778–207 BCE) of the Warring States Period for both official and private seals. They were often cast or carved in gold. Sometimes also called a tortoise knob.