How to distinguish the main and secondary credit cards of China Construction Bank?

There are several ways to distinguish between a primary card and a secondary card.

The first type: the mail card letter 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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