High schools generally have uniform clothes, and schools will require students to wear uniform clothes instead of relatively exposed clothes. Because high school is for the college entrance examination, the goal is the college entrance examination. In order to prevent puppy love, the school does not let girls dress up beautifully.

Universities and graduate students are relatively free. As long as it is not very exposed, it is basically no problem, including wearing stockings. It is human nature to love beauty, and free love is allowed in universities. You are beautifully dressed, which is also a beautiful landscape of the school. So middle school students are not allowed, but college students and graduate students are allowed.