This is a quatrain written in the genre of folk songs, which uses a common rhetorical device in folk songs-homophonic pun. In the summer afternoon, there are often wonderful weather with sunny weather, commonly known as "solar rain". It was after a solar rain, the willows were bathed in green and the river was as flat as a mirror. Suddenly a song came from the river, and the girl on the shore recognized that it was sung by the boy she liked. I haven't heard from him for a long time. I thought he forgot himself. Only when I heard this song did I know that it was like a sunny and rainy day in summer. I thought he had no feelings, but in fact he had feelings. The "sunny" here is a pun on "love", which comes from the above "sunrise in the east and rain in the west" and describes the girl's psychological activities. The poet wrote the girl's subtle psychological changes in only seven words, which made us seem to see her expression from resentment to joy, showing her superb artistic skills.