The interest rate of the installment fee of Hankou Bank is: 2. 1% for the third installment, 3.2% for the sixth installment and 5.6% for the first installment. The installment repayment interest rate of CCB Credit Card is 0.7% for the third installment, 0.7% for the sixth installment and 0.6% for 12 installment.

The annual interest rate formula of bank installment: annual interest rate = installment fee rate/(number of installments+1)*24= single installment fee rate * number of installments/(number of installments+1)*24. There are two ways to collect the installment fee, one-time and monthly. One-time handling fee can be used directly according to the rate/number of periods * 12. If it is charged monthly, the general rate is a few thousandths. If converted into annual interest rate, you can use the handling fee rate * 12.