In the text of Yuxiang, why are there such repeated words as "like lilac", "like me", "like a dream"

Parallel repetition (such as the second and third stanzas: "The color of lilacs/the fragrance of lilacs/the sorrow of lilacs" uses parallelism, "like me" and "like me" appear repeatedly, The characteristics of the girl are highlighted, and at the same time, there is a touch of sadness in the repeated chanting, forming the effect of looping and chanting in the poem; there is also the repetition of the content of the first and last stanzas, which strengthens the effect of looping and soothing sadness.

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