After Qin Shihuang unified China (22 1 year ago), Xiao Zhuan implemented the policy of "the words are the same, the cars are the same", and unified measurement is responsible. On the basis of the original script of the Qin Dynasty's Da Zhuan, it was simplified, and the variant characters of the other six countries were cancelled, creating a unified writing form of Chinese characters. It was popular in China until the end of the Western Han Dynasty (about 8 AD) and was gradually replaced by official script. But because of its beautiful font, it has always been favored by calligraphers. Because of its complicated strokes and simple form, it is free to add twists and turns, seal cutting, especially the official seal that needs anti-counterfeiting, and seal script was used until the collapse of the feudal dynasty.
Lishu, also called Han Li, is a solemn font commonly used in Chinese characters. Its writing effect is slightly wide and flat, the horizontal painting is long and straight, and it is rectangular, paying attention to "silkworm head and goose tail" and "twists and turns". Lishu originated in the Qin Dynasty, formed by Cheng Miao, and reached its peak in the Eastern Han Dynasty. Calligraphy is known as "Han Li Tang Kai".