If it is an ordinary loan, the reduction of the loan interest rate has no effect on the loan that has signed the loan contract, because the loan interest rate of the loan is still implemented at the contract interest rate. In the case of mortgage, if the floating interest rate is chosen by the user when signing the contract, then the loan interest rate will be lowered, and the mortgage interest rate will be lowered accordingly, which is also the agreement of executing the contract.

In short, the agreement on loan interest rate in the loan contract will directly affect the subsequent repayment interest, and everything is subject to the contract agreement.