1. Seek other supporting materials: Enterprises can seek other documents or records that can prove the loan interest rate, such as loan contracts, bank transfer records, interest payment vouchers, etc. These documents or records can prove the interest rate level of enterprise loans, thus replacing the interest rate certificate of similar loans in the same period.

2. Consulting professional institutions: enterprises can consult accounting firms, law firms or other professional institutions to understand the impact of failing to provide proof of interest rates of similar loans in the same period and the countermeasures. These institutions can provide professional advice on the determination and certification of loan interest rates.