The bank turns the credit line into money and puts it into the account of credit card customers for their use. As long as they pay back the money monthly, they charge no interest and only a handling fee. This money is not included in the credit card limit. This is indeed a reserve fund service launched by some banks at present.
At present, most banks provide credit card loans, which is often called reserve funds, but the internal name is different. For example, the "financial" business of Guangfa Bank is the "emergency reserve fund" service provided by the Credit Card Center of Guangfa Bank for cardholders. Credit card holders without any mortgage or guarantee and with good credit history can apply for cash advance to the Credit Card Center of Guangfa Bank.
China CITIC Bank, Ping An Bank, Bank of Communications and China Merchants Bank also have imprest business; You can consult the customer service of the credit card center for details.
Credit card prepayment can only be handled by invited customers. For the repayment method of the reserve fund, you can directly repay it by credit card in installments, and the handling fee will be paid in each installment. In other words, even if you pay all the money in one lump sum, you have to pay the handling fee every installment.
Some bank reserve funds are only applied for the bank's main credit card holders, and the customers in the designated list are invited by the bank credit card outbound marketing specialist.