寒来暑往,冬去春回,自然界的循环流转往往使人联想起进退穷达的社会处境,并进而转化为喜怒哀乐的主观心境,引起作为文化精英的文人的感悟,而形诸歌咏,正如钟嵘所说;“若乃春风春鸟,秋月秋蝉,夏云暑雨,冬月祁寒,斯四侯之感诸诗 Cold and summer, winter and spring return, the circulation of nature is often reminded of the social situation of relentless progress, and then into the subjective mood of emotions, aroused as the cultural elite literary understanding, , As Zhongrong said; ”If the spring spring bird, Autumn Moon cicadas, summer cloud summer rain, the winter months Qi cold, four Si sense of the poem