The rules for generating ID numbers in different countries vary greatly, and involve a lot of specific details and coding logic. Here we will briefly introduce several common countries and give you a rough sample (for illustration only, not actual accurate coding): ### China's 18-digit ID number: - The 1st and 2nd digits represent the provincial code; - The 3rd and 4th digits represent the municipal code; - The 5th and 6th digits represent the county code; - The 7th to 14th digits represent the date of birth; - The 15th to 17th digits are sequence codes, where the 17th digit is an odd number for males and an even number for females; - The 18th digit is a check code. Example: 11010519491231002X - 11 represents Beijing; - 01 represents the city district; - 05 represents Chaoyang District; - 19491231 is the date of birth; - 002 is the sequence code; - X is the check code. ### Taking California as an example, the ID number in the United States is not a standard number with a fixed and unified format. It may contain basic personal information such as name, date of birth, gender, address, etc. For example, a simple format: - The first few digits may be related to the area code; - The middle is the date of birth; - There may be check related digits at the end. Example: 010592M0123456789 - 0105 may be related to the area code; - 92 represents birth in 1992; - M represents gender (this is just a way of indicating); - The following are sequence or check related digits. ### Japan Japan's resident basic account number, composed of 12 digits: - The 1st to 3rd digits are the city code; - The 4th to 6th digits are the date of birth code; - The 7th to 11th digits are the sequence code; - The 12th digit is the check code. Example: 132045234567 - 132 is assumed to be a city code; - 045 represents the month of birth and other information (illustrative, not the actual corresponding relationship); - 23456 is the sequence code; - 7 is the check code. The ID card number rules belong to the sensitive information management part of each country. The specific coding is very complex and strict. The actual ID card number sample cannot be disclosed at will. The real and complete data. If you need to know more, it is recommended to consult the official information or professional literature of each country.