The rules for the preparation of passport numbers vary from country to country, but usually contain a combination of letters and numbers to uniquely identify each passport. The following are examples of passport numbers for some countries and regions and how they may be generated： ### 1. **Chinese passport** -**Example**: E12345678 -**Explanation**: -**E**: Indicates the type of passport, for example, “E” represents an ordinary passport, “D” represents a diplomatic passport, and “P” represents an official passport. - **12345678** : 8 digits, usually generated by the system in order to ensure uniqueness. ### 2. **U.S. passport** -**Example**: C1234567 -**Explanation**: -**C**: Indicates the type of passport, for example, “C“ represents an ordinary passport and ”D" represents a diplomatic passport. - **1234567** : 7 digits, usually generated by the system in order to ensure uniqueness. ### 3. **British passport** -**Example**: 123456789 -**Explanation**: - **123456789** : 9 digits, usually generated by the system in order to ensure uniqueness. ### 4. **Canadian passport** -**Example**: AA123456 -**Explanation**: -**AA**: Two letters indicate the type or place of issuance of the passport. - **123456** : 6 digits, usually generated by the system in order to ensure uniqueness. ### 5. **Japanese passport** -**Example**: AB1234567 -**Explanation**: -**AB**: Two letters indicate the type or place of issuance of the passport. - **1234567** : 7 digits, usually generated by the system in order to ensure uniqueness. ### 6. **Australian passport** -**Example**: N1234567 -**Explanation**: -**N**: Indicates the passport type, for example, “N" represents an ordinary passport. - **1234567** : 7 digits, usually generated by the system in order to ensure uniqueness. ### 7. **Indian passport** -**Example**: A1234567 -**Explanation**: -**A**: Indicates the passport type, for example, “A" represents an ordinary passport. - **1234567** : 7 digits, usually generated by the system in order to ensure uniqueness. ### 8. **Russian passport** -**Example**: 12 3456789 -**Explanation**: - **12** : Two numbers indicate the type or place of issuance of the passport. - **3456789** : 7 digits, usually generated by the system in order to ensure uniqueness. ### 9. **Korean passport** -**Example**: M12345678 -**Explanation**: -**M**: Indicates the passport type, for example, “M" represents an ordinary passport. - **12345678** : 8 digits, usually generated by the system in order to ensure uniqueness. ### 10. **French passport** -**Example**: 12AB34567 -**Explanation**: - **12** : Two numbers indicate the type or place of issuance of the passport. -**AB**: Two letters indicate the type or place of issuance of the passport. - **34567** : 5 digits, usually generated by the system in order to ensure uniqueness. ### Summary The method of generating a passport number usually includes the following elements： -**Type identification**: Used to distinguish between different types of passports (such as ordinary, diplomatic, official, etc.). -** Issuing place identification**: Used to indicate the place or country of issuance of the passport. -** Sequence number**: Used to ensure the uniqueness of each passport, it is usually generated sequentially by the system. The format and generation rules of passport numbers may vary from country to country, but the overall goal is to ensure the uniqueness and recognizability of each passport.