Wang Xizhi's book Preface to Lanting Collection used a sideline pen instead of Yan. As a representative work of Wang Xizhi's running script, his pen changes with the situation, playing around, making Shen Jing consistent with the beauty of flowing water, and light painting harmonious with heavy painting. The knot of words can be the ultimate, sometimes bowing, sometimes avoiding, sometimes indulging, sometimes gathering, hovering, winding, all kinds, virtual and real, as if anyway.

Its composition is written in draft, sloppy and clumsy. When smearing, the pen is black and scattered, and the triumphant state is on the paper, which has its own natural interest.

The world says that Xihe is good at using the method of infighting, so his wrist is strong, his pen is meticulous and comfortable, and he can do whatever he wants, but he has the beauty of neutrality and impartiality. It is difficult to know the mystery of his books, but he must copy and taste them again and again. Therefore, people who study Lanting everywhere are always careless at first, and the deeper they go, the more interesting they become. If you get a few percent of it, you can call it knowing the pen. If you get dozens of percent, you will be famous. Please study and try.

Running script appeared almost at the same time as cursive script. The early running script was mixed with cursive script and developed into a mature and independent writing. Wang Xizhi and Wang Xianzhi made outstanding contributions.

History says that Xiao Wang "created a new style that is neither careless nor true", which means running script. For example, the ink marks and manuscripts of the two kings handed down from generation to generation, and the Preface to Lanting, which is known as the world's first running script, are all examples of running scripts. Running script is between running script and grass, the one near running script is called "running script" and the one near grass is called "running script".