Official script is a new development after seal script. In the development of Chinese characters, if we look at the characters from Oracle Bone Inscriptions to Qin Xiao Zhuan. "Big and small seal script gives birth to eight points", and official script is classified as an ancient script by the seal script system, so the regular script used by official script until today belongs to the category of near-style characters. Pan Boying said in "On China's Calligraphy": "As far as the development of China's writing and calligraphy is concerned, official script is a stage of great change, and it is no exaggeration to say that it is official script today and even in the future." Lishu inherits the legacy of seal script and opens the source of regular script. The appearance of official script is an important turning point, no matter from the perspective of applied writing or calligraphy art.