Why did calligraphy theory appear in the Han Dynasty instead of the Qin Dynasty?

It is because the social and cultural development of the Han Dynasty is relatively prosperous, and the art of calligraphy has been widely developed and applied. At the same time, the cultural atmosphere of Han Dynasty was more open and free than that of Qin Dynasty, and people paid more attention to individuality and innovation, which provided conditions for the formation of calligraphy theory. In addition, calligraphers in the Han Dynasty paid more attention to the skills and art of calligraphy. They conducted in-depth research and exploration on calligraphy, and formed a series of calligraphy theory and techniques, which laid the foundation for the development of calligraphy art in later generations. However, in the Qin Dynasty, due to the extreme measures such as Qin Shihuang's burning books and burying Confucianism, the culture was seriously damaged, and the art of calligraphy could not be developed and passed down, so there would be no calligraphy theory.