What is literati calligraphy?

Ancient calligraphers were mostly writers and historians, who were good at poetry, parallel prose or history. Generally speaking, it is not just words that win fame. Su Huangmi Cai Su Dongpo in Song Dynasty was a master of literati. Ou was a master of literature in the Tang Dynasty. Scholars' calligraphy is based on knowledge, which is expressed through their own calligraphy, revealing a bookish atmosphere between the lines.