On the influence of politics on the development of calligraphy from the calligraphy of Qin and Tang Dynasties.

It can only be said that the influence of the Qin Dynasty on calligraphy is a policy of "the same language is not named". After Qin Shihuang unified China, due to numerous government affairs and frequent official documents, Prime Minister Li Si wrote a letter "Those who disapprove of Qin Wen". Qin Shihuang adopted Lisi's suggestion in time and ordered Lisi to formulate a new book and implement the policy of "the same text is not named". On the basis of prose, Lisi followed the principle of six books, simplified the complex, changed the difficult into the easy, and created Qin Zhuan, which became famous all over the world. Qin Zhuan is also called Xiao Zhuan, because Wenshu was called Da Zhuan in ancient times. The establishment of Xiao Zhuan ended the situation of variant characters in the Spring and Autumn Period and the Warring States Period, standardized and unified Chinese characters, and laid the foundation for the serialization and genre of calligraphy art development. It was used all over the country, and later, there appeared bamboo slips of popular songs in the society, which was beneficial to the development of literati communication and writing.

After Qin Shihuang ordered Lisi to create the seal script, he also accepted the official script created by Cheng Miao. As a popular official script, Xiao Zhuan's writing speed is slow, but the official script changes the circle of the official script into a square fold, and the rectangular structure of the official script into a convenient structure, which tends to be concise.

The development of calligraphy in the Tang Dynasty experienced three stages: the early Tang Dynasty, the middle Tang Dynasty and the late Tang Dynasty. The middle Tang Dynasty laid the foundation for the real calligraphy style in the Tang Dynasty and reached the ultimate beauty of calligraphy art. The early Tang Dynasty was a preparation and the late Tang Dynasty was a continuation. The social reasons for the prosperity of calligraphy in the Tang Dynasty are not only the prosperity of the country, the development of culture and the positive inheritance of the previous generation of calligraphy art, but also the establishment of "calligraphy", the cultivation of high-level calligraphy talents and the inclusion of calligraphy in the official system. This is a unique cultural phenomenon, which shows the social status and aesthetic value of calligraphy art, and also reflects the needs of the superstructure for art.

In the Tang Dynasty, calligraphy theory's research and comments were quite prosperous.

There were also many famous calligraphers in the Tang Dynasty.