In China, the social security number (social security number) is usually the same as the citizen ID number (18 digits), so there is no independent generation rule. However, in some countries (such as the United States), the Social Security number (SSN) has a specific structure. The following is a description of the situation.： --- ### **1. China's Social Security number** -**Structure**: The 18-digit ID number is directly used, and there is no separate social security number. **Example**: `11010519900307234X` **explanation**： -`110105': Administrative Division Code of Chaoyang District, Beijing -`19900307`: Date of birth (March 7, 1990) -`234`: sequence code (gender is male, odd number is male, even number is female) -'x`: Check code (replace with X at 10) --- ### **2. U.S. Social Security Number (SSN)** -**Structure**:'AAA-GG-SSSS` (9 digits, divided into three parts) **Example**: `123-45-6789` **explanation**： -`123`: Area number (Area Number, which once represented the place of issuance, is now randomly assigned) -`45`: Group number (Group Number, no special meaning) -`6789`: Serial number (Serial Number, generated sequentially) -**Rules**： -Area codes that do not contain `000`, `666`, or `900-999` are not included. -It is not used for identity verification and needs to be kept strictly confidential to prevent fraud. --- ### **3. Examples of social Security numbers in other countries** -**Canada (SIN)**: `123-456-789` (9 digits, with verification algorithm) -**United Kingdom (NINO)**:`AB123456C` (prefix letter + 6 digits + suffix letter) --- ###**Important reminder** -**China**: Social security information is bound to the ID card, and can be queried through the social security card or the government platform. -**Privacy protection**: Do not disclose the real Social Security/ID number to prevent identity theft. If you need to further explain the rules of a specific country, please provide the name of the specific country.