Tu Huo Qiang
Encyclopedia
Tu Huo Qiang is a kind of early Chinese long gun
Long gun
The term long gun is used to describe classes of firearm and cannon with longer barrels than other classes. In small arms, a long gun is designed to be fired braced against the shoulder, in contrast to a handgun, while in artillery a long gun would be contrasted with a howitzer or carronade.-Small...

 that first appeared in 1259. The projectile
Projectile
A projectile is any object projected into space by the exertion of a force. Although a thrown baseball is technically a projectile too, the term more commonly refers to a weapon....

 is called zi kē (Chinese: 子窠).
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