Precious postal customers belong to four-star customers. According to the query of official website Post, because the Postal Savings Bank comprehensively evaluates customers' ratings according to their credit records, repayment records, consumption records and other indicators, customers are divided into three grades: three-star customers, four-star customers and five-star customers. Jingui customers are one of the rewards and benefits provided by the top customers of Postal Savings Bank, so they are rated as four-star customers.