Calligraphy font is the classification of calligraphy style. There are five traditional calligraphy fonts: running script font, cursive script font, official script font, seal script font and regular script font, which are five categories.
Regular script is also called regular script, real script and official script. Li Shu, founded by Cheng Miao, has gradually evolved and become more simplified and level. Ci Hai is interpreted as "square and straight, which can be used as a model." Hence the name regular script. Regular script is characterized by neat rules and is a model in fonts, so it is called regular script and has been used ever since.