A celadon jade tubular bead, 5 cm long. Compare with jade bead with the same 'grain' design, Warring States, see Bonhams, Hong Kong, 26 Nov 2019, lot 8, and Compendium of Collections in the Palace Museum. Jade 3. Spring and Autumn Period and Warring States Period, Beijing, 2011, nos.215 and 218.