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What is the account number of each bank?

China Merchants Bank card number does not contain letters:

Passbook: 15 digits;

All-in-one card: 16 digits, and some customers hold old cards with 12 digits;

Credit card: American Express card is 15 digits, and all other card numbers are 16 digits.

(Response time: June 2, 2022, please refer to the latest business changes announced by China Merchants Bank in official website)