The poem rhymes with an.
In the poem "Qilu Long March", the last word of each couplet rhymes with an (flat tongue sound). There are eight sentences in this poem, and each two sentences is a couplet. The endings of the sentences are Xianxian, Wanwan, Nuannuan, Hanhan, and Yanyan, all in rhyme.
In poetry, rhyme is a common rhetorical device. By using the same rhymes and finals, the poems can have a better sense of phonological harmony and beauty.