It may be the deducted guarantee fee, which will be deducted when the loan is approved. When handling provident fund loans, you must pay the corresponding guarantee fee to the provident fund center according to the loan amount and number of years. If the repayment is made in advance, it will be refunded in proportion. No prepayment, no refund.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.