(1) Flint gun, also known as flint gun, is a heavy firearm set by Wei Sheng, a general in the Southern Song Dynasty, with a range of 200 steps (about 260 meters). This is used by weisheng to defend Haizhou and fight against the rulers. Its actual principle is uncertain, which may be that the stone is fired with gunpowder, or that the stone and gunpowder are fired at the same time.

(2) The maximum effective range of Franco gun is 2000 yards, about1830m.

(3) The Red Easy Gun was changed from the taboo of Manchu to the Red Easy Gun, with the longest range of more than 20 Li. This is an English cannon, which was bought from the Portuguese at the end of the Ming Dynasty. There is also a saying that the gun was made by China Minnan craftsmen imitating the Spanish Luzon gun.

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