Wang Xizhi is in an era of calligraphy reform. Wang Xizhi's early Cao Zhang was mature, and Wang Xizhi's early works inherited the characteristics of Cao Zhang. Cao Zhang is a cursive script, which is not the same as the later cursive script. Such as aunt's post.

Brief introduction of Wang Xizhi:

Wang Xizhi's Preface to the Collection of Lanting is highly praised by calligraphers of all ages and is known as "the best running script in the world". Wang Jian is good at following the laws of Li, Cao, Kai and Xing, carefully studying the shape, imitating the shape with his heart, learning from others' strengths, preparing everything in one furnace, getting rid of the style of writing in Han and Wei Dynasties, and becoming a family of his own, which has far-reaching influence.

So Wang Xizhi's font is cursive. There is no clear boundary between line and grass. Wang Xizhi's words are mostly between the two, and different copybooks have different orientations. For example, "Preface to Lanting" and "Sunny Post in Fast Snow" are running scripts. Lines, posts and far official posts are all cursive.