Although the achievements of Song Ci are great, they are worse than the contents of poetry. Influenced by Taoist thought, Song poetry is "reasonable in words, but silent in feelings". Therefore, describing love and pornography has become a professional word field. On the one hand, this is a tradition of inheriting pronoun love in Tang and Wu dynasties. At the same time, there is another reason: the ancients divided literature not only into genres, but also into styles. Words are "poetry" and "Tao", which are "inferior" to poems and essays.