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I suggest you do it in private.
Because you need a lot of documents to make your own official publication.
You must buy the publishing license number from the publishing house.
If you just sell CDs,
You have to apply for a cultural business license to get a business license for this business project.
This is a very troublesome procedure.
Other "training students, selling DJ supplies, clothes, headphones and so on." By the way, "approval is not required.
Just get an industrial and commercial business license directly.