Sai Men Dao Che Fortress Gate Knife Cart

A woodcut depicts a Sai Men Dao Che, a traditional Chinese defensive siege engine. The image shows a wooden cart with a single visible wheel in the foreground. The front of the cart features a large, vertical rectangular frame fitted with multiple horizontal rows of outward-facing blades or knives. The cart has a tiered wooden structure behind the blade-shield and a curved handle or tow bar at the rear.