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What are the digits of Xi’an bank card?

16 or 19 bits. According to relevant query information, the debit and credit cards of Bank of Xi'an both have 16 or 19 digits. Among them, the 16-digit bank card number usually refers to an ordinary debit card or credit card, while the 19-digit bank card number refers to the UnionPay cooperation card of Bank of Xi'an, that is, a UnionPay card co-branded by the bank.