ANCIENT CHINESE HAN DYNASTY JADE BI. With dragons on both ends and both sides and a small dragon is under the clouds at the center, and other designs may symbolize the heaven. The incised designs are nearly the same on each side. The dragon’s head is distinguished from the preceding types by the axe-shaped silhouette of the lower jaw. The item is 26cm x 11cm. Which dynasty is known for bi discs of jade? Is a type of circular ancient Chinese jade artifact. Later examples date mainly from the Shang, Zhou and Han dynasties. He bought the item for a much higher price, unfortunately his son broke it.