since you are opening a store in a shopping mall, you should first sign a lease contract with the shopping mall, then think of a good name, take the contract and go to the industrial and commercial office to apply for a business license. After you get the business license, you can go to tax registration and then apply for a health certificate for employees, and then you can start business. After you start business, you can apply for a food hygiene license and set up a ledger, so that the self-employed certificate is completed.