It expresses the poet's sad feelings of farewell. The whole poem expresses the poet's attachment, farewell, sadness, helplessness, lingering feelings, and regret for the destruction of great rivers and mountains. .Analysis of the poet's emotions expresses the poet's attachment to the sunset. Analyze the emotion of the poem When will the sunset return? Sunset: the evening sun; When will it return? The sun sets in the evening, and I don't know when it will come back. It expresses the poet's sadness of farewell. The whole poem expresses the poet's feelings of attachment, farewell, sadness, helplessness, lingering feelings, and regret for the destruction of great rivers and mountains. Analysis of the poet's emotions expresses the poet's attachment to the sunset. Analysis of the emotion of the poem This is a farewell poem. The poet integrates the emotion of farewell into the scene of the sunset, making the feeling of farewell described in the poem more intense. In this poem, the poet expresses his deep affection for his friends and his regret for the destruction of great rivers and mountains.