Cao Zhi, the son of Cao Cao in the Three Kingdoms, was brilliant since he was a child, and he said that "seven steps make a poem". Xie Lingyun, a poet in the Northern and Southern Dynasties, said, "There is only one stone in the world, and Cao Zijian has eight fights to himself. I have to fight, and the world is divided into one battle. " While being conceited, Xie Lingyun spoke highly of Cao Zhi. Therefore, later generations refer to those who are outstanding in learning as "talents with eight struggles" or "people with great talents".