Explanation:
1. SN code is the abbreviation of Serial Number, sometimes known as Serial No., or the product serial number. The product sequence is a concept introduced to verify the legal identity of the product, which is used to protect the legitimate rights and interests of users and enjoy legitimate services.
2. A set of genuine products only corresponds to a set of product serial numbers.
3. Also known as: machine code, authentication code, registration application code,etc.