Lot 336. Two jade bi discs, Warring States period (475-221 BC). Estimate 40,000-60,000 HKD. Photo: Sotheby's.

each worked on both sides with the 'grain' pattern, the stones of a greyish celadon tone with calcified milky inclusions; 15.5 and 15 cm, 6 1/8  and 5 7/8  in.

Provenance: Collection of T.Y. Chao (1912-1999), and thence by descent in the family.

Sotheby's. Chinese Art including Selected Works of Art from the T.Y. Chao Family Collection, Hong Kong, 30 nov. 2017, 02:00 PM