这首诗是唐代诗人许浑所作,许浑生活在晚唐时期,诗歌多反映社会动荡和个人情感。本诗题为《霅上宴别》, likely written during a farewell banquet by the Zha Stream (霅溪) in present-day Huzhou, Zhejiang. It expresses the sorrow of parting with a friend who is traveling westward, reflecting the common themes of separation and nostalgia in Tang poetry. The historical context includes the decline of the Tang Dynasty, where poets often used nature imagery to convey inner emotions.