For example, the card number is 436722333344555, the first four digits are the name code of the bank, the last four digits are the use code of the card, the middle four digits are the activation time of the card, the last four digits are the branch location code, and the last three digits are the user's personal code.
The main business areas of China Construction Bank include corporate banking, personal banking and treasury business, with branches and subsidiaries in 29 countries and regions, and subsidiaries in many industries such as funds, leasing, trust, life insurance, property insurance, investment banking, futures and pension.
Extended data
Numbering rules of bank card numbers
The bank card number is generally 16 digits or 19 digits, and consists of the following three parts:
1, the first six digits are: issuance IssuerIdentificationNumber(IIN).
2. The middle number is: personal account number identification (starting from the seventh place of the card number).
3. The middle digit is defined by the issuing bank and generally consists of 6- 12 digits. You can use at most 12 digits.
Every bank has different rules for identifying individual account numbers. Some banks will include code information such as branches, sub-branches and savings outlets in this part. Some banks may not be so detailed, but they will use the natural serial number, and the last digit is the parity bit.
Baidu encyclopedia-bank card number
Baidu Encyclopedia-China Construction Bank