At present, it is not stipulated that the same bank can handle multiple credit cards, and the same bank can apply for multiple credit cards, but the credit limit is shared, that is, the credit card with the highest limit is the highest limit.
In the case that the same bank holds multiple credit cards at the same time, the credit lines of multiple credit cards are the same. Generally, credit cards with low credit lines enjoy the available credit lines of credit cards with high credit lines.
For example, if someone holds three credit cards in a bank with a credit line of RMB 30,000, then the credit line used by the three credit cards together is RMB 30,000. When one card overdraws 4,000 yuan, the other two cards can only overdraw 26,000 yuan.