apr 18, 2500 BC - Jade Cong
Description:
They used two distinct types of ritual jade objects: a disc, later known as a bi, and a tube, later known as a cong. The main types of cong have a square outer section around a circular inner part, and a circular hole, though jades of a bracelet shape also display some of the characteristics of cong.Added to timeline:
Date:
apr 18, 2500 BC
Now
~ 4529 years ago