With the shape of trapezoid, this jade knife is made of semitransparent jade. It is seen fivedifferent size holes with unidirectional drilling on the upper part of the blade. Both sides of the blade have shown convex profile. The color and quality of jade are similar to those of the jade knife of Shanghai Museum collection. Antiquity evidences include cleaving vein, diffusive marking and mica.本器由半透明青黃玉雕琢而成, 上方有五孔呈單向鑽法, 前方寬闊工整,後方較窄留有殘片. 全器拋光精緻光潔, 冰裂紋及曝露晶片等古玉跡象明顯.