Erguotou, also called double-ring firecrackers, is a traditional folk product, which is often used in festivals, weddings, festivals and other occasions. It is based on the principle that the reaction force generated by the bottom powder hitting the ground is lifted off.

Firecrackers are louder than guns, because firecrackers have no guns, and the sound spreads in all directions and can be heard far away, while guns have guns hitting gladiators, and the sound is relatively closed and cannot be heard from a distance.