How to distinguish the main card from the auxiliary card when building a bank card? Urgent! ! !

There are probably the following ways

The first type: the card letter sent by mail will be marked with the main card and the auxiliary card.

The second type: the front of the landlord card has a pinyin name below the card number. According to the pinyin name, the main card and the auxiliary card can be distinguished.

The third type: call the service hotline on the back of the credit card to confirm.

If you have any other questions, ask them.

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