How to classify China Mobile customer levels?

Star rating introduction: Personal credit rating is a service that provides customers with corresponding overdraft limits and overdraft periods based on their online age and phone bill consumption. Currently, account credit is divided into six categories: quasi-star, one-star, two-star, three-star, four-star and five-star***. Five-star is the highest, with the highest credit limit and the most There are no additional charges for this service with a long credit period.