|Drawing of a Huo Jian Liu (highlighted), from 'Shen Qi Pu (《神器譜》)'.|
Chinese attempted to solve this issue by developing various types of multiple rocket launchers, which could launch large numbers of rockets at once. While this 'spray and pray' approach alleviate the accuracy problem somewhat, it was very wasteful.
Huo Jian Liu presented a much more refined solution to early rocket's accuracy issue. Developed by Zhao Shi Zhen (趙士楨) in the sixteenth century, Huo Jian Liu is, for all intent and purpose, an arquebus that shoots rockets instead of the usual lead balls. It has greater range, less recoil, and faster reload speed than typical matchlock gun. The launcher itself is cheaper to manufacture, as it does not require a gun barrel (this is, of course, offset by more costly rocket ammunition).
To prevent the backblast of the rocket from harming the gunner, the matchlock mechanism is mounted farther away from the gunner, and a gun shield is installed at the back of the stock.
Regrettably, this invention failed to catch the attention of Ming government, and never went beyond the prototype stage.