This sentence appeared at the beginning of a novel as a description of the novel's scene. The purpose of this sentence was to create an atmosphere to make the readers interested in the following plot. By describing the beautiful scenes of spring and autumn, the author makes the readers feel that the shortness and impermanence of time imply the circulation of seasons and the shortness of life. At the same time, this sentence also expressed the author's feelings and thoughts about time and life. He believed that the flow of time and seasons could not change the essence of life, and it also hinted that life was short and that one should cherish the present. The author expressed a kind of appreciation and sentiment towards life, believing that the flow of time and seasons could not change the essence of life, emphasizing that life should cherish the present.