It's from the poem Osmanthus fragrans.
The following is an introduction to poetry:
Ancient poetry is a general term for ancient China poetry, which refers to the poetry works created by ancient China people. Ancient poems in a broad sense include poems, ci poems and Sanqu poems, while ancient poems in a narrow sense only refer to poems, including ancient poems and modern poems.
Free verse is a poem with irregular syllables, rhythms and other formal designs. It pursues "organic form" and relies on the natural rhythm of speech. This kind of speech is "natural" to the theme and feelings of the poem. Free verse is not a modern invention, but it occupies a significant position with the arrival of modernism and constitutes a rebellion against the fixed form of poetry in the 19th century.
Narrative poetry is a genre of poetry. It depicts characters in the form of poems, and expresses emotions by writing people's narratives. Compared with novels and dramas, its plot is generally simpler. This genre, with stories, characters and other novels, has the characteristics of lyric poetry.
for the above information, please refer to Baidu Encyclopedia-Poetry.