For example, the poems in The Book of Songs were all taken by later generations. The poems in The Book of Songs originally had no titles, and most of them were used as the titles of poems by later generations in order to distinguish them, such as (the white dew is frost, the white dew is frost). There are also key words in poetry as topics, such as (how dare you say that you are naked and in the same robe as your son),< Sheng Min > (Mr. Jue, Wei Shi Jiangyuan), and it is also useful to simplify and extract the words in poetry sentences as topics, such as (Taoyao, burning its splendor) (Guanluo Luodove, in Hezhou).
There are also Li Shangyin's untitled poems, such as. The title of this poem is untitled. In order to distinguish it, he compiled it into untitled One Second and so on. But later generations still use the method of The Book of Songs, and the previous two words were used as the title of the poem, such as