A sandstone kang stone, used to close the oven's firing gate. Shanxi province, Gaoping or Changzhi county, 18th or 19th century. One side is decorated with a cat (or is it a tiger?), the other with a Ying Yang symbol in a roundel. It’s a stunning piece of folk art that probably dates back to the 18th C. Di.: WxDxH 38x11x33cm.