If you only sell water purifiers and do not produce them, you don’t need to apply for any documents yourself. You only need the manufacturer to provide you with relevant documents, including: business license, tax registration certificate, organization code certificate, Registered trademark certificate, patent certificate, agency certificate, etc., and the most important thing? Water-related approval document (must have it). If you open your own company, that is another matter.
I make Shenzhen Haios water purifier, all certificates are complete, the product is very good, I recommend it to you for reference