Xian Ma Keng Horse-trapping Pit

A rectangular diagram depicting a "pit to trap horses" (Xian Ma Keng). Inside the rectangle are six stylized, flame-like or cloud-like shapes arranged in two vertical columns of three. These shapes likely represent the camouflaged openings or the stakes/obstacles within the pit trap. The drawing is executed in a simple line-art style characteristic of Ming or Qing dynasty technical manuals.

Wang likely a collector's seal or mark