After Qin Shihuang unified the six countries, he felt that the national writing was complicated and the style of writing was different, so he put forward the idea of "the same language is not named" and unified the writing and style. Qin Shihuang asked Lisi, who was good at calligraphy, to write a ghost. Therefore, Xiao Zhuan is also called "Qin Zhuan". In Qin dynasty, some small seal characters were cast on iron, and some were carved on stone tablets and stone tablets. The characters are big and small, the composition is natural, the words are dignified and the branches are neat, which is the essence and representative of Biography.
On the basis of the seal script originally used by Qin State, Xiao Zhuan simplified it, canceled the other six characters and created a unified writing form of Chinese characters. It was popular in China until the end of the Western Han Dynasty, and was gradually replaced by official script. But because of its beautiful font, it has always been favored by calligraphers. Because of its complex strokes and simple form, it is possible to add twists and turns and seal cutting at will, especially the official seal that needs anti-counterfeiting. Seal script was always used until the collapse of feudal dynasty and the emergence of modern new anti-counterfeiting technology.
The representative works of Xiao Zhuan in Qin Dynasty include Taishan stone carving, Cang Xie stone carving, Li Ji stone carving and erudite stone carving.