card raising means that when the credit card overdraft is about to exceed the bottom line, credit cards from other banks are used to fill the vacancy. This is card raising.

to put it simply, it means spending with card A, and paying back the money owed by card A with the amount of card B after the bill. When it's time for B card to pay back the money, use the credit line of C card to pay back the money of B card. When the C card should be returned, use the A card to return it.

Extended information:

The way to raise a credit card is that the cardholder must first apply for two or more credit cards.

then, the repayment dates of several credit cards are staggered, and the first credit card is used for daily consumption. Before the repayment period, the second credit card is used for overdraft, and the debt of the first credit card is also paid, and so on, and several credit cards are overdrawn in turn.