Cao Cao is good at writing poems, expressing his political ambitions with great boldness of vision, generosity and sadness, and reflecting the miserable life of the people in the late Han Dynasty. Prose is also neat, which opens and prospers Jian 'an literature and leaves precious spiritual wealth to future generations, which is called Jian 'an style in history. At the same time, Cao Cao is good at calligraphy, especially at carving grass. In the Tang Dynasty, Zhang Huaiguan named it a "wonderful flower" at the end of Shu.