青龍, 白虎, 朱雀, 玄武(龜蛇合體)合稱為四靈獸, 本器青玉雕琢, 形制為玉璧, 雙面對稱, 飾四靈獸淺浮雕, 古玉跡象為擴散暈沁色及鈣化. Carved with pale tone jade, the object is a jade bi decorated with low relief four auspicious animals consisting of dragon, phoenix, tiger, turtle coupling snake. The motifs are symmetrical on both sides. Antiquity evidences are diffusive markings and calcification. For any questions, please write to Prof. Chen.