There are already many such questions on Baidu, and you can find out by just using your hands.

The first 2-3 digits of the 13-digit code represent the country or region, which is called a prefix code.

The first 7-9 digits (including the prefix code) indicate the manufacturer, which is called the manufacturer identification code.

The last 3-5 digits are the product item codes, and manufacturers code their own product items.

The last digit is the check code, used to verify the correctness of the first 12 digits.

R is a registered trademark

TM has submitted an application and has accepted the trademark that has not yet been officially approved.