What is He Chuanxin's comment on the "self-narrative post" in Su's self-narrative post?

He Chuanxin wrote a self-narrative post by Su, and his evaluation of the self-narrative post is: writing big characters with fine pen, the strokes are round and free, like a winding steel rope, and the pen tip is sharp as a hook, so-called' iron painting silver hook'. The whole volume emphasizes the continuous grass trend, flipping up and down with the pen, jerking from left to right, fluctuating and swinging, fast and fast, light and heavy, like a rhythmic music melody, very dynamic.

In addition, there are some casual paintings, which emphasize the breaking meaning and endless brushwork of the pen, the tip of the pen is hooked back, and the point echoes the painting. Throughout the composition, strange changes and shocking waves are the ultimate expression of cursive art.

Shen Leping, a calligraphy theorist, commented in Fifty Lectures on the Introduction to New Cursive Calligraphy: The first half of the "self-report post" describes Huai Su's own calligraphy experience and evaluation, which is soothing, elegant and leisurely; When I wrote others' praises in the second half, I was crazy, and the climax came-and look at the flying handwriting, it was really like a flurry, powerful and without delay; The simplicity and precision of lines and the breadth and breadth of posture are beyond the reach of ordinary people.