I don't know which one you are asking. If it is the lower limit of interest rate in floating interest rate, then the first floor explains it thoroughly; If it is the lower limit of the benchmark interest rate, it means that the loan interest rate lent by commercial banks cannot be lower than this lower limit. This is mainly to prevent commercial banks from pushing the loan interest rate too low in pursuit of competitiveness, thus affecting the normal operation of the market.

I hope I can help you.