First of all, most mainland middle schools don't allow students to wear stockings, but only a few schools allow girls to wear black stockings. I think the reason why middle school students don't wear stockings is that China schools are too rigid, too conservative and too feudal. I have been to Japan to see other middle school students, and 20% of them are white, 40% are flesh-colored, 30% are black, and the rest are just wearing skirts. Secondly, white pantyhose is not suitable for thick-legged girls, which will make them And as a girl, I wear pantyhose for a long time in adolescence, which will cause a large number of harmful bacteria and anaerobic bacteria in the stalls, causing various common inflammations. Because pantyhose are mostly airtight, it is added that vaginal secretions are alkaline in childhood and acidic in adolescence. I also suggest that you might as well wear garters, which are very popular in the West.