Banking supervision rating is an index system to evaluate the risk prevention ability and credibility of banking institutions. AAA institutions have the highest risk prevention ability, excellent market competition performance and the highest credibility. AA and A-level institutions are also prominent in the market competition, with strong risk prevention ability and low loss risk. BBB institutions are ordinary institutions with relatively low risks. Institutions with BB and B grades are high-risk institutions. These rating standards are evaluated according to the financial status, capital adequacy ratio and risk management ability of banks.