Card numbers 1 and 12 are accounts opened earlier, starting with the city area code. For example, the card number in Beijing starts with 0 10. This card number generally has no logo of UnionPay or other international organizations, and can only be used at China Merchants Bank's own outlets or ATMs.
2. 16 digit card number is a bank card with UnionPay logo or VISA logo, such as all-in-one card, UnionPay Gold Card and UnionPay golden sunflower card. This card number can be used by major banks and merchants at home and abroad, with high convenience and security.
3. 15 digit card number is passbook card, which is a traditional deposit account. This card number can only be used for deposit and withdrawal, not for consumption or transfer. Generally used for large deposits or time deposits.