1. For example, people's feeling of loneliness is "a bright line at the foot of my bed", visualizing their lonely thoughts into moonlight and expressing a feeling of loneliness and meditation.
2. "Is there frost already?" Expressing homesickness, using frost flowers on the land to compare the pain of being far away from home and parting, endless desolation and yearning, and expressing the poet's homesickness for leaving home.
3. Looking up, I found it was moonlight, and then I suddenly thought of home. By using the juxtaposition metaphor of "bright moon" and "hometown", I gradually guided readers to deeply feel the inevitable emotional event of "parting" through two kinds of image perception.