Lot 1526. An unusual large greyish-green jade bi, Ming dynasty or later; 8 15/16 in. (22.8 cm.) diam. Estimate USD 6,000 - USD 8,000. Price realised USD USD 7,500. © Christie's Images Ltd 2011.

The convex top well carved in high relief with nine chilong as if emerging from the skin of the jade, the reverse carved in low relief with bosses within a grid pattern, within deeply scored line borders, the grey-green stone with extensive opaque whitish mottling, the reverse matte. 

Christie's. Fine Chinese Ceramics and Works of Art Part I and Part II Including Property from the Arthur M. Sackler Collections, New York, 24 March 2011