The self-narrative post is Huai Su's masterpiece of cursive script in his later years. The whole article is crazy grass, pen and pen in the middle, such as cone drawing sand table, vertical and horizontal oblique straight; Echoing up and down like a storm, you can imagine that when you are doing exercises, your heart and hands are in harmony, and pride is full of enthusiasm. In the Ming Dynasty, An Qi called this post: "Ink paper is colorful and moving, in which the vertical and horizontal changes are extreme and mysterious."