Credit cards can be divided into primary cards and secondary cards. The secondary card of the credit card is attached to the main card, and the amount will not exceed the main card. The cardholder of the primary card can also limit the amount of the secondary card. The application conditions for the credit card sub-card are as follows:

When filling in the credit card application form, there will be a column of "whether to apply for supplementary card". When handling the secondary card, you need to fill it out completely, so that both the primary card and the secondary card will be sent to you;

Activate the master card. The opening method of the credit card master card will be explained in detail in the card delivery envelope, and the activation can be completed as long as the operation steps are followed;

Finally, the secondary card of the credit card can be used at the same time, but it should be noted that the secondary card of the credit card also has an annual fee, so the number of swipes is also needed.

When using a credit card, whether it is the primary card or the secondary card, you should maintain good consumption habits and avoid bad records.