YANG BodaThe concave arc trace on the jade cong king unearthed from Fangshan Number 12 tomb in Zishan, Yuhang, Zhengjiang destroys the integrality of the jade, which was purposely craved on the jade by the request of the master of the tomb.

• 浙江省余杭县雉山村反山12号墓出土的玉琮王庄严神圣,但其底部留有经琢磨而成的“凹弧痕”破坏了该器的完整。