 The weapons described include bombs, fire arrows, rockets, land mines, naval mines, fire lances, hand cannons, and cannons mounted on wheeled carriages.Although the earliest edition of the "Huolongjing" was published in Xiangyang sometime prior to 1395, its preface was not provided until the Nanyang publication of 1412.The 1412 edition, known as "Huolongjing Quanji" ("Complete Collection of the Fire Dragon Manual"), remains largely unchanged from its predecessor with the exception of its preface, which provides an account of Jiao Yu's time in the Hongwu Emperor's army.