Subject ratings are generally divided into AAA, AA+, AA, A+, A, BBB+, BBB+, BB+,B, CCC, CC, C, D, E and other grades. AAA is different, so is E. The subject rating is classified according to the repayment ability and credit status of the subject, with AAA indicating the highest repayment ability and credit status, and E indicating the lowest repayment ability and credit status. AAA subjects have the highest credit status, the strongest repayment ability, the lowest credit risk and the lowest interest rate. E-level entities have the lowest credit status, the weakest repayment ability, the highest credit risk and the lowest interest rate. Subject rating is a way for financial institutions to evaluate the borrower's credit status, which can help financial institutions identify the borrower's credit risk and thus better manage the loan risk.