At present, there is no lower limit for deposit interest rate and no upper limit for loan interest rate, and only the upper limit is controlled for specific banking institutions. The interest rate is determined by both parties through consultation.

If both parties agree on the interest rate, and the bank charges interest beyond the agreement, it is a bank breach of contract, and the bank can be sued for breach of contract according to the provisions of the Contract Law.

However, this usually does not happen. . .