 During, the Han Dynasty, Chu lyrics evolved into the "fu" (賦), a poem usually in rhymed verse except for introductory and concluding passages that are in prose, often in the form of questions and answers.From the Han Dynasty onwards, a process similar to the origins of the Shi Jing produced the "yuefu" poems.In the Northern Dynasties historical records indicate Cao Cao was a brilliant ruler and poet.