The principle of the wedding petal gun is that by rotating the bottom, the air pressure in the closed fireworks tube will increase. When the air pressure is too high to hold, the plastic film on the head will collapse and the shredded paper flowers inside will pop up. Fireworks tube, also known as wedding salute, fireworks, fireworks, guest flowers, fireworks, is a kind of fireworks set off by hand in festive occasions such as opening ceremony and wedding. The common specifications of fireworks display tubes are 5 cm, 40 cm, 60 cm, 80 cm, 100 cm in diameter, and the contents include colored strips+sequins (flashing), colored strip petals, happy characters, love and so on. The outer packaging is generally gold and red, and white foreign trade fireworks tubes are also common.