The PLL05 (or Type 05) is the self-propelled mortar-howitzer system based on a WZ551 6X6 wheeled chassis. The system combines features of the conventional mortar and the howitzer, firing projectiles at both short-range, high-arcing ballistic trajectories and longer-range, less steep ballistic trajectories for indirect fire. The PLL05 has been equipped by the 127th Light Mechanised Infantry Division of the 54th Group Army since 2008. A track-based version of the system is currently in development.