Some books also say that a spear equals a gun, which I am still not sure about, but from some novels and documents, I am afraid it is wrong to completely combine a spear with a gun. The longest spear is 4 meters, which is mainly used for car fighting. The spear on horseback is usually called Guan, and the short spear and javelin (throwing spear) are called fir. There are also some special ones, such as snake spears and barbed spears.