The document discusses the origin and development of the Korean writing system known as Hangul. It outlines that Chinese writing was originally used in Korea under Chinese occupation. In 1444, the Korean alphabet was invented and promulgated in 1446 under various names like Hunmin jeongeum and Eonmeun. While Korean writing was associated with lower status in early periods, a mixed writing system using Hanja and Hangul developed in the 19th-20th centuries. The modern Hangul alphabet contains 24 letters or jamo with graphical shapes representing speech organs, and spaces between words.