There are changes during the day and night. Who knows what the weather will be like. The yin and yang change, and who knows what the weather will be like? It expresses the author's indifferent mood. "Eighty-Two Poems on Huai" is a poem written by Ruan Ji, a writer during the Three Kingdoms period. These eighty-two poems were written by Ruan Ji as he felt and were later compiled. They were all written with his feelings in mind, rather than being written in one moment.