The first detailed description of using the “fire cannon” in warfare was in connection with a battle fought in 1126 when the Song army used it against the invading enemy.The so­called “fire cannon” was a tube made of bamboo filled with gunpowder which，when fired，threw a flaming missile towards the enemy.According to a description of a battle scene in 1132，it took two persons to carry a “fire cannon”，and the cannons were fired from a moving platform.And this platform had to be moved close to the wall of the besieged city.