Hangul - Wikipedia
https://en.wikipedia.org/wiki/HangulKoreans primarily wrote using Classical Chinese alongside native phonetic writing systems that predate Hangul by hundreds of years, including Idu script, Hyangchal, Gugyeoland Gakpil. However, many lower class Koreans were illiterate due to fundamental differences between the Korean and Chinese languages, and the large number of Chinese characters. To promote literacy a…