Gong Rong Pao (攻戎砲)

Drawing of a Gong Rong Pao, from 'Wu Bei Zhi (《武備志》)'.

The Gong Rong Pao (攻戎砲, lit. 'Barbarian-attacking cannon') is one of the few carriage-mounted cannons in the Ming arsenal. It is actually not a new design, but a Da Jiang Jun Pao (大將軍砲) mounted on an box-shaped, two-wheeled gun carriage. The carriage itself is made of elm or Pagoda tree wood, and comes equipped with four iron anchors. The anchors have to be burried into the ground before the cannon can be fired.