supplementary cards can be used by the immediate family members of the main card users, such as parents, children and spouses. Many parents will choose to apply for a supplementary card for their children. The amount of the main card and the supplementary card is used, and the repayment is made by the main card. However, the name displayed by using the supplementary card is still the user of the supplementary card.
On the one hand, parents can adjust their own quotas to prevent their children from spending money indiscriminately, on the other hand, they can also help their children develop a correct consumption concept. Supplementary cards must be at least 16 years old before they can be processed. Generally speaking, it is convenient for the family.