Middle and lower classes. The master's thesis with a score of 90 or more in blind review is excellent, which belongs to a higher level and is Grade A; Between 75 and 90, it can only be good, medium and b; The score below 75 is poor, which belongs to the lower-middle level, so 74 in the blind test is the lower-middle level, and the C-level .. blind evaluation refers to a system of organizing expert group evaluation, that is, anonymous submission, which means that the evaluation tutor does not know who the author of the paper is. In this way, the false positive rate of scores is low, which is generally used in college marking.