In short, kicking two feet is to wrap gunpowder in dense paper, use the expansion generated by gunpowder explosion to fry paper and make noise to entertain the masses. Because there are two sounds, it is called two kicks.

Ertui is a double-ring firecracker, and the northeast is called Ertui or double bell. Because Elki Kerr has double-ring firecrackers, "Elki Kerr" means double-ring firecrackers. "Firecracker" is a kind of firecrackers. "Erkicker" is a kind of firecrackers, and selling rabbits to camels is an explosion.

. Firecrackers with two kicks are a traditional folk product, which is often used in festivals, weddings, commemorative ceremonies and many other occasions. It is based on the principle that the powder at the bottom is lifted off by the reaction force generated when it hits the ground when it explodes. The paper tube with double kicking firecrackers is divided into two layers, and the function of the lower layer is to send firecrackers to the sky. After the upper layer lifts off 10 ~ 20 meters, it will explode in the air.