Bibliography
Cao Cao was an accomplished poet, as were his sons Cao Pi and Cao Zhi. He was also a patron of poets such as Xu Gan. Of Cao Cao's works, only a remnant remain today. His verses, unpretentious yet profound, helped to reshape the poetic style of his time and beyond, eventually contributing to the poetry styles associated with Tang Dynasty poetry. Cao Cao, Cao Pi and Cao Zhi are known collectively as the "Three Caos". The Three Caos' poetry, together with additional poets, became known as the Jian'an style, which contributed eventually to Tang and later poetry. Cao Cao also wrote verse in the older four-character per line style characteristic of the Classic of Poetry. Burton Watson describes Cao Cao as: "the only writer of the period who succeeded in infusing the old four-character metre with any vitality, mainly because he discarded the archaic diction associated with it and employed the ordinary poetic language of his time." Cao Cao is also known for his early contributions to the Shanshui poetry genre, with his 4-character-per-line, 14-line poem "View of the Blue Sea" (as translated by Wai-lim Yip).
