I think all the people wearing JK uniforms are porn actresses and straight men with cancer standing in princesa sexy uniform shop. Go to Baidu Encyclopedia first, and then show your IQ.
Quote a book to answer the official question: "imitation school uniform" refers to the popular clothing that imitates the style of school uniform. At that time, female high school students began to appear on the school campus, and they were free to wear school uniforms or other school uniforms. According to media reports on fashion trends, behind this phenomenon is the desire of female high school students to wear cute and comfortable school uniforms that can only be worn now. The concept of uniform, which used to be regarded as a "management symbol", has gradually become a "fashion to show yourself". -from "The Beauty of Skirts"