After the Qin Dynasty unified China, it took a series of measures to consolidate its rule, including the famous Tongwen Lu, which unified the different writing styles used by various countries in the Warring States period into what was later called Xiao Zhuan.
Based on the original Qin system, Qin Shihuang unified the political, economic and cultural systems of some countries in an attempt to eliminate the regional differences caused by long-term separatist regimes as much as possible in order to facilitate reunification.
During the Warring States period, although the basic structure of Chinese characters in different countries was the same, the complexity of fonts and the position of radicals were different. Li Si was ordered to unify the script. Based on the characters of Qin State and referring to the characters of six countries, he formulated seal script, wrote it as a model, and promoted it throughout the country.
At that time, there was a popular calligraphy called official script, which was simpler than Xiao Zhuan. However, due to the same writing requirements, but with Xiao Zhuan as the standard text, it is necessary to "burn poetry books", strengthen ideological control, and take officials as teachers to prohibit private learning.
Extended data:
Seal script originated from Oracle Bone Inscriptions and other ancient hieroglyphics.
Seal script is a general term for big seal script and small seal script.
Dazhuan refers to Oracle Bone Inscriptions, Jinwen, Wen Zi (namely Dazhuan) and six countries (Qi, Chu, Yan, Han, Zhao and Wei), which preserved the obvious features of ancient hieroglyphics.
Xiao Zhuan, also known as "Qin Zhuan", is a commonly used character in Qin State and a simplified font of Da Zhuan. Xiao Zhuan, also known as Qin Zhuan. Seal script is official script. It is a standardized common font for official documents. Before the Qin Dynasty, the characters of Chinese characters had no special names, and Xiao Zhuan gradually evolved from the characters of Qin in the Spring and Autumn Period and the Warring States Period.
References:
Xiaozhuan-Baidu Encyclopedia