In order to consolidate their power and privilege, rulers of the three dynasties established a set of jade usage system, leading to the appearance of a series of jade artifacts for ceremonial use, such as Gui (ceremonial blade), Qi (notched axe) and Ge (halberd) in addition to traditional ones such as Bi and Cong.Meanwhile,elites wear jade on their garments to show their social status,which stimulated further development of jade ornaments. These ornaments were commonly taken in the shape of animals and mythic deities.