The main reason for cursive writing is the speed requirement of daily practical writing. Any kind of writing style has the requirements of simplicity and easy writing, resulting in the trend of saving simple strokes and scribbling. This trend is the main reason for the evolution of characters. From the Warring States Period to the end of Qin Dynasty and the beginning of Han Dynasty, politics, military affairs and prison affairs were busy, public and private documents exchanged frequently, characters were used more and more frequently, and the requirements for writing speed were constantly improved, so the cursive script of seal script came into being, that is, cursive script.
It is generally believed that the "chapter" of the rules and regulations is synonymous with the articles of association and Zhang Kai's "chapter", which means rules and regulations, and conforms to the characteristics that the early cursive script slightly contains the meaning of official script, the characters are not related to each other, the strokes exist, and there are rules to follow.