1, the projection of the darkness of reality and the disillusionment of ideal in the poet's mind
Here, the poet metaphorically described the dark and dreary social reality at that time as a narrow and lonely "rain lane". There is no sound, no joy, no sunshine here. The poet himself is such a lonely person wandering in the rain lane. In his loneliness, he has a beautiful hope, a neurotic person and an unattainable ideal, and a tragic theme with the characteristics of the times.
2. Explain that this is a lyrical artistic conception with strong symbolic color.
In Rain Lane, the image of a young girl is tragic, and so is the image of the lyric hero-the wanderer (a lonely wanderer runs through all Dai Wangshu's works). His pursuit is so noble, with an idealized color. The girl he expects has both a deep inner world and charming charm; It is beautiful and does not bend over before suffering. However, he himself is so hard to understand. He knows neither himself nor each other well. Maybe what he expects is always the image in his heart.