Well, your friend is helping others cash out, lift the card and cross the bridge. There is a charge for helping others in this way. For example, the cost of raising a card is 2 cents of the monthly credit card limit (2% of the monthly handling fee), the withdrawal fee is about 1 to 2 cents (that is, to help others take out the credit card money), and the bridge crossing fee is about 3 cents (if you have a 10W credit card, you have used it, but you can't afford it, and you don't want to overdue it. These are shady operations, and you are not recommended to do them. In addition, there are points in this operation, which can be used as money.