A langyao glazed deep dish.Yongzheng six-character mark and of the period.The copper red layer on the exterior curving walls and the tall foot applied beneath a celadon-tinged glaze visible on all other surfaces except the foot pad, the recessed base displaying the underglaze blue mark in standard script within a double ring.Size: 6 1/4 dimeter.Provenance:Bonhams auction San Fracisco.