Because firecrackers will do harm to car paint.

We can choose to use more environmentally friendly balloons instead when we get married.

Choose red balloons in advance, inflate them all, and then string the full balloons into a string and fix them on the launching equipment. The so-called launching equipment is a wheel that can pull the disc at the bottom of the balloon rope, and some protrusions can be made on the disc to puncture the balloon. When it's time to set off firecrackers, let people pull the wafer to the other end of the balloon rope, followed by a sound almost like firecrackers. This form is not only environmentally friendly, but also achieves the effect of setting off the atmosphere without choking.