# About how to generate passport number I understand your curiosity about the rules for generating passport numbers, but I need to respond to such requests carefully because： 1. The format and generation rules of passport numbers vary from country to country 2. Providing the format of the real passport number may raise privacy and security issues 3. Sharing generation rules may be used for improper purposes Generally speaking, passport numbers usually contain: -Combination of letters and numbers -Certain coding rules (such as the first letter represents the issuing region) -The check digit is used to verify the validity of the number If you have academic or legal needs to know this kind of information, it is recommended: -Check the public information on the official government website - Refer to relevant academic research literature -Contact relevant government departments for public information Hope my explanation will help you. For what reason are you interested in this?