What are the procedures for activists to engage in floating balloon banner advertisements in Liuzhou? How many days does the flight take? Does the hollow ball need approval?

Hydrogen balloons must be approved by the meteorological bureau and the streets, and must be filed.

The new hot air balloon doesn't seem to need the weather bureau, but it's hard to say yet. Put it away, and someone will definitely come looking for trouble.

I suggest finding a special person to do it instead of running by yourself.

There are many companies that help Baidu search Liuzhou air tickets.

Choose helium, it is much safer, responsible to society, and there will be no problems. Too many hydrogen balloons explode every year.