Lishu is a script evolved from Qin seal script. The cursive script of seal script evolved into official script. The Qin dynasty used seal script, which was difficult to do. In order to write more characters on bamboo slips, Cheng Miao and others in the palace collected, sorted out, standardized and simplified a popular character (budding official script). The writing method was born. The slender and round seal script was squashed, sketched and sketched on the bamboo slips, and the strokes and characters of the strokes evolved, and the characteristics of dovetail (tail) evolved, giving birth to modern characters and beginning to end the history of ancient Chinese characters dominating the world. Therefore, it is only the work of Li people, because it belongs to the official seal, so it is called official script. Matured in the Eastern Han Dynasty, none of the inscriptions in the early period of Lishu left a name. Historically, there has never been a saint in official script. Official script can be divided into two stages: Qin official script and Han Li official script. Qin official script is also called Guli, and Han Li official script is called Jinli.
Since the official script, Chinese characters have been written with strokes, which are collectively called modern characters, also known as stroke characters. The appearance of official script is a major change in the history of writing, marking the basic end of ancient writing and the birth of modern writing.
Lishu is a watershed and turning point between ancient Chinese characters and modern Chinese characters, and it is also the beginning of the change from single-line painting to multi-stroke writing in the history of Chinese characters, or the source of the development from vertical to horizontal in the history of Chinese characters.