What role does the ending of Xu Zhimo's Shi Anna La play in Shi Anna La?

This poem is about a Japanese girl saying goodbye to her lover. "The gentleness of the bow is the most, like a hibiscus out of water, and the shyness with a cool breeze can't be overcome." It describes a girl who bows gently and shyly when she says goodbye to her lover. The repeated collection of "a treasure of one word, a treasure of one word" makes readers feel the girl's mood strongly. "There is sweet sadness in the treasure." The girl's lover is going to the battlefield, and the girl's desire for love and concern for her lover are all shown. "shian Nora" translated into Chinese means goodbye. This sentence is the crowning touch of the whole poem. Through the sound of a poem called Sianna La, readers can feel the complex mood of a young, sweet, shy and sad girl in Goodbye.