2.JK is the abbreviation of "じょしこぅこぅせぃ" (female college students), which usually refers to female high school students. JK is also one of the lovely attributes in ACGN subculture.
3. The word "JK" is the acronym of female college student JoshiKoukousei, which refers to Japanese female high school students. Usually sweater cardigan+long-sleeved sailor+pleated skirt is the main dress, which is called JK uniform. Ordinary orthodox uniforms can't reflect light at first, but they are made of special materials and won't shrink seriously.
4, the coat is short, just arrived at the navel, the version is quite crisp, that is, it can't receive the waist. Pleated skirts are generally 20 pleats, 19 is obviously unorthodox ... but in theory, but uniforms are also designed by people, not so rigid. The above is just a summary of most Japanese high school uniforms.