Someone was sent to Songjiang. What is the first sentence of the poem? What is the role in expression? What kind of scene does the second sentence of the poem describe? What did the poet say?

(2) The whole poem expresses a kind of parting when breaking up with others. The first sentence uses the scenery to render the sadness of parting, and the "bleak west wind" renders the desolation of parting; The second sentence directly expresses the sadness of parting, which is heartbreaking. The two of them sat silently without touching a drop of wine. The fourth sentence: The poet has been watching his friends leave alone and calmly in the silent twilight and misty rain, which aggravated and deepened his sadness when he left.