General shopping malls and ordinary customers do not promise to pay in installments. What we often operate is installment operations between individuals and banks, such as credit card installments. The specific operation is like this. You go to the mall to buy a camera with your credit card. After swiping the card, the bank will transfer the payment for the product to the store. The remaining thing is the money you owe the bank for the camera. Before the credit card settlement date arrives, you will call your credit card to open the card. The bank applies for installment payment. However, installment payment requires a handling fee, which is actually the nature of interest. You should weigh it yourself