. The calligraphy styles of Su Shi, Huang Tingjian, Mi Fei and Cai Xiang are different, and Su Shi's calligraphy is ups and downs and naive. Huang Tingjian's calligraphy is vertical and horizontal, arrogant and depressed; Mi Fei's calligraphy is unrestrained, calm and happy; Cai Xiang's calligraphy pays attention to ancient meaning and statutes.
The calligraphy of Su Shi, Huang Tingjian, Mi Fei and Cai Xiang had an important influence on China's calligraphy.
It is generally believed that the so-called Cai refers to Cai Xiang (), and Cai Xiang's calligraphy adopts the method of Jin and Tang Dynasties, paying attention to ancient meaning and statutes. Block letters are dignified and steady, the running script is pure and beautiful, and the cursive script adopts the method of flying white, which is called "scattered grass", which is self-contained and very beautiful.
However, since the Ming and Qing Dynasties, there has been another saying. Judging from the arrangement order of the four schools and the characteristics of the times, "Cai" originally referred to Cai Jing, and it was only after later generations hated him that it was replaced by Cai Xiang.