What do Gu Yuyu, Yu Dou and Yu Jue stand for respectively?

Jade is a flat round jade with a hole in the middle, which is one of the traditional jade ritual vessels in China.

Jade barrel [yǒ d ǒ u]: refers to jade wine vessels and jade barrel-shaped vessels. Or refers to the Big Dipper, and it is also a metaphor for Jiangshan.

Jade Jue [yù jué]: It is the oldest jade in China, with a ring shape and a gap. In ancient times, it was mainly used as earrings and accessories. Small jade bamboo slips are often unearthed in the ears of the dead in pairs, similar to today's earrings, while the larger ones are ornaments and Jeff.