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According to the total amount of natural ranking words of search engines, the richness of pages and other factors, a comprehensive evaluation of 109871 There are 10 grades in total, and 10 is the highest grade; At the same time, according to the average ranking, all websites at all levels are rated as good, medium and weak, Represented by "+, unsigned, -", for example, level 9 will have 9+, 9, 9 -.