How many types of fireworks are there?

Clause 2, Article 3, Decree 137/2020/ND-CP (Effective from January 11, 2021) on the management and use of fireworks stipulates the following:

Firework materials include:

- Explosive firework materials: These are direct products used for producing explosive fireworks. Under the impact of mechanical, thermal, chemical, or electrical stimuli, they create a fast and strong chemical reaction that releases heat, generates gas, and produces high pressure causing an explosion;

- Non-explosive firework materials: These are direct products used for producing non-explosive fireworks. Under the impact of mechanical, thermal, chemical, or electrical stimuli, they create a fast and strong chemical reaction that releases heat, generates gas, and produces colorful light effects without causing an explosion.

Respectfully,