What is the poem called the eternal romance in Huanxisha's A New Word-Drink a Cup?

There is nothing to do, flowers bloom and fall, and it seems familiar that Yan returns.

"It has nothing to do with flowers, it seems to meet Yan." For nature.

odd-even

Sentence, this sentence is clever and implicit, fluent and implicit, harmonious in sound and rhyme, profound in meaning, sad and touching. It shows the poet's ingenious thinking and deep affection by using function words to form neat antithesis, vivid and sigh, which is also the reason why this word is famous.