What are the calligraphy features and characteristics of Preface to Lanting Collection?

Shangyu Post of Preface to Lanting Collection (Tang Shenlong Edition) was presented by imitation hemp paper in Tang Dynasty, and is now in Shanghai Museum. The inscription of this post is also very fine, and its grass method is smart and graceful, which is beautiful. Seventeen Posts was named Seventeen Posts because it was preceded by the word "seventeen". This post * * * contains 28 letters, * * 107 lines, 942 words, delivered with a pen, with a vigorous posture. There is no connection between the characters at all, but the characteristics of coherent momentum, rigorous statutes and clear stippling are all presented in the font.

Seventeen posts

Preface to Lanting Collection (Tang Shenlong Edition)

Cold cut post (Tang copy)