The opacity and distinctive markings in the stone of the bi are similar to that of one in the Art Institute of Chicago, also ascribed to the Liangzhu Culture, illustrated by E. Pearlstein in "Salmony's Catalogue of the Sonnenschein Jades in the Light of Recent Finds", Orientations, Selected Articles from 1983-1996, p. 130, fig. 1. See, also, the similar Liangzhu bi of comparable size (23 cm.) excavated from Fuquanshan, Qingpu county, Shanghai, illustrated in Gems of Liangzhu Culture, Shanghai Museum and Urban Council, Hong Kong, 1992, pp. 166-7, no. 60.