The differences between debit card and credit card composite cards are as follows:

1. Essential differences: Credit card is also called credit card. There is a certain initial limit in the card. Users can Overdraft consumption within the credit limit. Debit cards have nothing to do with overdrafts. They can only be used according to the funds you deposit. Composite cards are "one card with multiple uses" and have the advantages of magnetic stripe cards and the characteristics of IC cards.

2. The usage methods are different: with a credit card, you consume first and then repay; while with a debit card, you must deposit money first before it can be used for consumption or other purposes, otherwise there will be no money in the card. It's like a useless card. Composite cards can be used for multiple purposes.