You go to the local civil affairs bureau for consultation and approval, and then go to the industrial and commercial bureau for business license, as well as the tax registration certificate of the local taxation bureau, the code certificate of the technical supervision bureau, and the bank account opening permit.

Equipment must have corresponding special vehicles; It's hard to say exactly how much it costs, but it should be decided according to your actual situation (for example, some wedding companies are "Mercedes-Benz" teams).

There are many related services on the Internet, you can refer to:

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