Although painting started late, Yu Chengyao actively studied calligraphy when he was young. I taught myself regular script at the age of seventeen and cursive script at the age of twenty. He only wrote Cao Kai all his life, thinking that with Cao Kai as the cornerstone, he could write well by practicing official script. His calligraphy was introduced by ancient inscriptions. He said: "Writing is expensive and has a personal style.
Don't follow others. "Calligraphy is like a person. His calligraphy is usually flowing in one go. Words and their structures seem illusory, but they are magnificent, showing a frank, simple but unconventional literati style. The later his calligraphy is, the more clumsy it is, and it has a natural and uncut charm.