Jade Bi is the ritual jade which is dedicated to the heaven. This Liangzhu Culture jade bi has carved with two God’s face as the sole motif. This Liangzhu bi is quite unique  in that is different from most of the plain bi carving. Calcification is the main evidence for its age.

在玉器中，璧是用於祭天的玉器，《周禮·春官·大宗伯》記載「以玉作六器，以禮天地四方: 以蒼璧禮天。良渚文化出土的玉璧最多，大多光素無紋，只有少數幾件有刻劃紋飾。本器雙面對稱雕琢， 上下各飾神面淺浮雕，刀工精美， 孔壁呈現錯位琢磨痕跡， 全器鈣化現象明顯。