Archaic Jade Dragon Pattern Openwork Bi with Jasper Base. Height 50cm, length 28cm, width 5cm. Han Dynasty or earlier, later fitted with a jasper base. Main body: yellow jade/Xiuyan jade with natural Icing color?base: jasper. Crafted with openwork and low relief; the center features a hollowed dragon, the outer ring with hunting and auspicious beasts, and the top with double dragons. A vital ritual jade of the Han Dynasty, core material for studying Han jade craftsmanship and religious beliefs.