Sleeping at night in Jiande is a five-character quatrain written by Meng Haoran, a poet in Tang Dynasty. The poem describes the poet staying at Jiande River. By describing the scene of staying and adding sorrow at dusk, he expresses the poet's yearning for his hometown. The poet expresses his yearning for freedom and nature by describing the vastness of the universe and inner loneliness. The last sentence points out the poet's melancholy feeling of loneliness and helplessness. The whole poem expresses the poet's deep feelings and nostalgia for his hometown in concise and lively language, and also reflects the poet's desire for freedom and a better life.