I want to sell my own air purifier. What are the procedures? Do you need to set up a company and apply for a patent?

As a product sales, the most important thing is to have a business license and then operate within the business scope.

Secondly, you should consider whether your product meets the relevant national mandatory standards, because it must be an electrical product and you need a quality inspection report before you can sell it.

Whether to apply for a technology patent is another matter. The first thing you can do without setting up a company is to contact an agency to help you apply for a patent. It is best to authorize, at least to ensure that your current product does not infringe others' patents.