In this case, unlicensed operation is illegal from the first day of operation, and the industrial and commercial bureau can impose a fine. However, it is necessary to give you a written notice after he comes to check you, pay a fine before the date on the notice, and get a business license and other relevant documents before starting business.
No matter where you operate, you have to go through the relevant formalities and certificates. If you do it well, you will have less psychological burden.