I suggest you swipe your card carefully, get a clear understanding of each stage, carefully check whether there are other surcharges, handling fees, postage, etc., and see if it is too much, or if it is not explained, it is already in the total payment amount.
The installment fee of China Merchants Bank's credit card in JD.COM Mall is apportioned according to the amount of each installment. So the total price of one-time purchase and installment purchase is different.
Pay attention to repayment in full and on time to avoid other expenses.