What does it mean that the property has no credit rating?

Property integrity is not good. According to the comprehensive credit score, the credit rating of property services is divided into five grades: excellent, good, qualified, basically qualified and unqualified. Among them, the credit score is 90 to 100, which is an excellent property service community with a credit rating of AAA; ; If the credit score is 80 to 89, it is a good property service community with a credit rating of AA; If the credit score is between 70 and 79, it is a qualified property service community with a credit rating of A; If the credit score is 60 to 69, it is a basically qualified property service community with a credit rating of B; If the integrity score is below 60 points, it is an unqualified property service community (project), and the integrity level is C.