Interest is charged from the billing date (usually the day after credit card consumption, the specific date is written on the bill) according to each credit card consumption on your bill last month, with a daily rate of 0.5 ‰.
Example: There are two transactions on the bill, one is RMB 2,000 in April of 15, and the bookkeeping date is April of 16, and the other is RMB 954.29 in May of 1 year, and the bookkeeping date is May 2. At the same time, assuming that you have paid back ¥ 1272.8 before the final repayment date, when calculating the interest, the interest for the first repayment is r1= 2000× (days between 4/16-5/31) × 5 ‰;
Second interest R2 = 954.29× (days between 5/2-5/31)× 5 ‰;
Then the residual interest R3 = (2954.29-1272.80) × (days between 6/1-6/12 )× five ten thousandths;
So the total interest on your bill this month =R 1+R2+R3.