This exquisitely carved old jade bi most likely derives from the Eastern Han dynasty (221-206 bce). The small heavy disk features carving on both sides of carriages or chariots with horses. The disk is approximately 2-5/8 inches in diameter with 5/16 inch inner diameter, and is 1/4 to 5/8 inch thick (25.4 mm/in) including carving relief. Note: A bi is a flat jade disc with a circular hole in the centre. Neolithic bi are generally undecorated, while those of later periods of China, like the Zhou Dynasty, bear increasingly ornate surface carving whose motifs represented deities associated with the sky (four directions) as well as standing for qualities and powers the wearer wanted to invoke or embody. As laboriously crafted objects, they testify to the concentration of power and resources in the hands of a small elite.