What unique ideological style did Su Shi create in calligraphy?

Su Shi (1037 ~110/) was born in Meishan (present-day Sichuan). Zeng Guanli Shangshu, Hanlin Bachelor, etc. He is an outstanding poet, writer and calligrapher in the history of China. Calligraphy, together with Huang Tingjian, Mi Fei and Cai Xiang, is called Su Huang Camouflage. Su Dongpo is the main advocate of the book tide of "Song Shangyi". He put forward his own ideas in many aspects. For example, "I can't remember a book, and I can't wait for it." "There is no fixed method for writing, but it is empty and wide." He also said: "Although I am not good at reading, I am not as good at writing as I am. If I can understand what I mean, I often say that I can't learn. " He also said that the characteristic of his calligraphy is "like cotton wrapped in iron". Huang Gu said: "Dongpo's book, the spirit of learning literature is gloomy and sandy, and between pen and ink, others can't reach it." Although he argues that it is impossible and he has his own methods, he only advocates a broader view of law. There is something wrong with his handwriting. For example, Dong Qichang once pointed out that "in-laws writing too much is also a disease". His works include Suzhou Cold Food Poetry Post, Qianchibi Fu, Dongting Spring Poetry, Alnus cremastogyne and so on.