In some countries' cultures, it is a traditional custom to use cannon cars and fire guns at weddings, which means wishing the couple happiness, prosperity and good luck. Cannon cars are usually made of some metal materials, equipped with combustible gas and fire source devices, which can release ribbons, paper flowers and other items.
However, the specific shooting methods, such as whether to use gasoline or not, may vary according to regional and personal habits. This may require more specific investigation or asking local professionals to get an accurate answer.
It should be noted that no matter what shooting method is adopted, safety is always the primary consideration. Local safety regulations and operating procedures shall be observed to ensure the safety and legality of activities.