According to the era of King Sejong joseonwangjosilrokin Sejong annals, King Sejong of the 1446 and 1443 Korean changje Banpo. 1443 (25 Sejong) wanseongdoeeo lunar September to early 1446 (Gregorian early October) banpodoen hunminjeongeum meant that the 'right to teach people sound'. Natchwo once, and are often known as amkeul eonmun eonseo half, and today we are 'English' said. One of the characteristics of a systematic character choseong neutral syllable to syllable jongseong dividing eumso character as a unit together with the nature and character of that, let syllable. At the time the letter system was hunminjeongeum changje choseong 17 characters, 28 jayeoteuna neuter all 11 characters, some of them are neutral and choseong Obsolete, but today only 24 are used. Besides using 28 characters byeongseo yeonseo sseuyeoteumyeo character, seongjo bangjeom is used to display.