The situation you are talking about belongs to Bank of Communications' credit card overflow deposit, that is, how much money is deposited first and then withdrawn.

According to Bank of Communications regulations, handling fees will be waived for withdrawals of credit card overflow deposits from our bank in the same city within the country. A handling fee of RMB 2 per transaction is charged for cross-bank transactions in the same city within the country, but the handling fee is waived for business cards, and the cash handling fee is waived for Sanjiang Aerospace Cards.

Please note that if the withdrawal limit exceeds the deposit limit, handling fees will still be charged.

If you use a youth card to withdraw cash, there is a handling fee of 5 yuan per transaction.

For other card types, there is a renewal fee of 1 yuan per transaction, with a minimum of 10 yuan. If you withdraw 500 yuan, it is only 5 yuan when calculated as 1, which is less than 10 yuan, so it is collected as 10 yuan. Interest will also be charged, which is 5/10,000 of the daily interest. It is simple interest within the month, not compound interest. That is, within a month, every day is 5/10,000 of 500. That is, you have to pay it back after 30 days. The number is 500*0.0005*30 500 10=517.5