(K2②: 146-2), measuring 17.7 cm in diameter, 6.7 cm in aperture diameter, 1.8 cm in height, and weighing 263.6 grams. Unearthed from Sacrificial Pit No. 2 at the Sanxingdui site, discovered inside a bronze zun vessel. The jade Bi is light green and slightly translucent. Its surface is flat, with edges gently rounded. Both sides are adorned with finely carved concentric circular incised lines, lines are flat with shallow concentric grooves. The edges on both sides are slightly raised, with the upper edge relatively flat.