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| Drawing of a Huo Dan Tong (highlighted), from 'Shen Qi Pu (《神器譜》)'. |
The Huo Dan Tong was a hand-mortar-style flare gun designed by Ming Dynasty firearm specialist Zhao Shi Zhen (趙士楨) to be used in conjunction with the Jiu Tou Niao (九頭鳥) during night fighting, shooting Huo Dan (火彈) to illuminate targets for the heavy matchlock gun.


