Fireworks are actually similar to the structure of firecrackers. Their structures contain black powder and medicinal lead. In order to achieve good performance, fireworks and fireworks are filled with a large number of gunpowder for launching and exploding. For example, a 20 centimeter floral projectile will explode up to about 200 meters high before it is launched, and the radius of these stars can be about 80 meters in radius.