Official script is another representative character after Xiao seal, which is based on Xiao seal. The appearance of official script is a great revolution of Chinese characters. Its significance lies not only in the symbolization of Chinese characters, but also in changing the writing style and aesthetic trend of Chinese characters, thus laying a foundation for the emergence of regular script calligraphy art and further opening up a broad world for the development and prosperity of China calligraphy art. Li Zhimin, a pioneer and professor of Peking University, believed that the unification of six languages by Qin Shihuang was of positive significance to the social progress at that time, but it was not necessarily conducive to the development of calligraphy art.
Therefore, in various calligraphy gardens in the Qin and Han Dynasties, the art of regular script (called official script at that time, that is, assisting seal script to write faster) was directly bred. According to its law, the development history of regular script in China can be divided into four periods: the germination period of regular script-Qin and Han dynasties, the development period of regular script-Wei, Jin, Southern and Northern Dynasties, the prosperity period of regular script-Sui, Tang and Five Dynasties, and the maturity period of regular script-Song, Yuan, Ming and Qing Dynasties.