China's calligraphy is customarily divided into four parts: orthography, cursive script, official script and seal script. Zhengshu refers not only to regular script, but also to Wei Bei. Cursive scripts include Cao Zhang, Jin Cao, Crazy Grass and Running Script. The grass of official script is called Cao Zhang. The grass in regular script is called this grass (grass). The Book Score of Tang Dynasty represented by Sun. On the basis of this grass, the lettering is called Mad Grass (Big Grass), with continuous stippling, round Lian Bi and wild and changeable fonts. Represented by Zhang Xu and Huai Su. Between the grass and the right is a running script (which later became a running script font alone). Lishu came into being in the late Qin Dynasty and early Han Dynasty. At first, it was mainly used to copy official documents in order to be concise, and later it was also used to write inscriptions and cliff carvings. Seal script is the general name of Oracle Bone Inscriptions, Zhong Ding, Shigu and Xiao Zhuan.
Later, calligraphy developed into five styles: seal script, official script, cursive script, regular script and running script. In this way, calligraphy fonts can be collectively called "four styles" and "five styles".