Diameter: 145mm
This was handmade by the artist 般书人 Ban Shu Ren.
This blue-white porcelain is known as Yingqing 影青 "Shadow Jade" and also as Qingbaici 青白瓷 "jade white porcelain." It is known for its jade-like quality and the beautiful patterns carved under the glaze that are especially pronounced when lit from behind.