What are the artistic features of Zheng Banqiao's calligraphy?

Zheng Banqiao's calligraphy, most praised by later generations, is his "six-and-a-half-minute book", which created suddenly and shocked the world. His Six-and-a-Half Book is a new book style based on official script and mixed with truth, grass and seal. There are different opinions about the origin of the name "six books and a half", and the general difference lies in the distribution of the proportion of each body. Banqiao's calligraphy research mainly focuses on the study of steles. He said: "Ci studies Han Wei, Cui, Cai and Zhong You. The ancient monument was broken and deliberately searched. " (Banqiao Poems) When I was studying in Jiao Shan in my early years, Banqiao had a special liking for Tuoheming. Later, during his decades as an official in Fanxian and Weixian, Shandong Province, he extensively collected and traced back the inscriptions since the Han and Wei Dynasties, and accumulated a rich foundation of epigraphy. At the same time, he has great respect for former sages such as Su Dongpo, Huang Gugu and Xu Qingteng. Dongpo's round and heavy stippling, ivy-like street paving, trembling pens in the valley and crooked lines all had a far-reaching impact on the formation of his book style. Zheng Banqiao, about 50 years old, went to Wei County to be an official. Now he has been planting bamboo in Yangzhou for more than ten years, and his calligraphy has gradually become a melting pot, smelting truth, grass, official seal and seal. At this time, his original "Six Books and a Half" is already "a pattern, such as autumn flowers leaning against stones, wild cranes suddenly smoking, which is naturally interesting, and it is called slab bridge style, multi-effect, and can be like others" (Niu Yingzhi's "Rain Window Eliminating Meaning"). Zheng Banqiao's great achievements were highly praised by Fu Baoshi in On Zheng Banqiao: "This is not only a bold and amazing change at that time, but also a school created by me for thousands of years." Works handed down from ancient times include Preface to the Newly Built Town God Temple, Poem Axis of Jiannan, Judgment, Poem Axis of Gu Mo, Poem of Cao Cao Viewing the Sea, etc.