Huolongjing

The Huolongjing (traditional Chinese: 火龍經; simplified Chinese: 火龙经; pinyin: Huǒ Lóng Jīng; Wade-Giles: Huo Lung Ching; rendered by its translator into English as Fire Drake Manual; in modern English, Fire Dragon Manual) is a 14th-century military treatise that was compiled and edited by Jiao Yu and Liu Bowen of the early Ming Dynasty (1368–1683) in China. It outlined the use of various "fire weapons" involving the use of gunpowder.

The Huolongjing provides information about various gunpowder compositions, including "magic gunpowder", "poison gunpowder", and "blinding and burning gunpowder". It has descriptions of the Chinese hollow cast iron grenade bomb, shrapnel bombs, and bombs containing poisonous concoctions. The book describes the 10th-century Chinese fire arrow and its evolution into the metal-tube-launched rocket, various rocket launchers, the advent of the two-stage rocket that has a booster rocket, and fin–mounted, winged rockets. The book also describes the use of explosive land mines and naval mines, and the latter's use of a complex trigger mechanism. The book describes the development of other weapons, including various proto–guns such as the fire lance, handguns with up to ten barrels, handguns with possible serpentine locks used as components in matchlock firearms, early bombard and cannon, cannon barrels filled with metal balls containing poisonous gunpowder solutions, and cannons that were mounted on wheeled carriages.

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