We appreciate calligraphy, look at lines, look at structure and look at composition. When appreciating lines, see whether the lines are solid and whether ink and wash are interesting; The thickness of the lines varies, depending on whether the change conforms to the beauty of the golden mean; The lines change dramatically, depending on the ink color of the whole chapter; Such as its Fiona Fang, priority, etc. , are all expressed by lines. Its styles are different, some are steady and some are elegant. Of course it feels like dancing, and cursive script is the easiest to express.