In the early Northern Song Dynasty, the "integration of poetry and lyrics" was a creative idea put forward by Su Shi regarding lyrics. He believed that poetry has the same origin and belongs to one body, and words are "the descendants of poetry". This first theoretically eliminated the concept that poetry is superior to words and inferiority; in order to make the aesthetic taste of poetry keep pace with poetry in a true sense, Su Shi also He put forward the idea that Ci must "be of the same family"
; he also further expanded the expressive function of Ci and opened up the context of Ci, which was the main direction of Su Shi's reform of Ci style.
Su Shi understood the style of Ci based on literature, emphasized the historical origins and similarities between Ci and poetry, and promoted the development of Ci style~