Hundreds of fireworks tubes are tied to an iron net with an area of more than several square meters according to the position shown in the figure.

It must be more than a few thousand dollars.

It is also controlled and cannot be transported to you by ordinary vehicles.

Can't detonate in ordinary places,

You must apply in advance and pay the management fee.

The iron net structure is stable and accurate, which belongs to static effect and has long luminous time.

Large-scale national-level activities,

Use dozens to hundreds of barrels to dot matrix to form an image.

The cost is higher,

Repeated experiments are needed to make the graphics generally stable.

Because this is a dynamic motion in the air, the emission is uneven.

Due to the influence of airflow, it is difficult to form a pattern stably.

High cost, long cycle and huge equipment,

Ordinary people can't enjoy it.

Fireworks have been used to explode graphics, which are more unstable and uncontrollable.

Unmanned aerial vehicles (UAVs) have been used abroad, and the cluster movement has a dynamic effect.

Subtitles can be formed, and subtitles can be constantly changed.

This kind of plane can avoid collision between planes, and the plane can know its position accurately at any time.

Controlling flight trajectory is a comprehensive national defense technology, and private individuals can't afford foreign teams.

Still using various projection equipment produced abroad,

On the wall,

Printing your own DIY subtitles and your own drawings is the most practical, because you don't need flammable substances.

This is a good way to get rich. You can start a new global business without being controlled by fire and safety or polluting the environment with chemicals.

Used for courtship, love vows, confession and statement.

It can be your impromptu oral declaration, and automatically print subtitles after speech recognition.

It is an epic, a narrative poem and an improvisation. It's definitely an instant original expression.

Just add software identification and injection functions to imported hardware.

What a good way to make a living! ! ! ! !

Live narration, instant subtitle display, three-dimensional animation image conversion.

As for the more advanced engineering technology, guided fireworks, guided fireworks, hee hee, you can't send it out if you write too much.