Through personification, the scene of rain hitting the window glass when it rains is written, which embodies the author's depressed and sad mood glass and symbolizes the gap between hearts. Sentences express the feeling that he can't communicate with others/or that he wants to help someone but can't/or that he is not understood. In other words, the author wants to go deep into the hearts of others and help them, but the door of that person's heart is closed, and his situation is free to play and his junior high school level is high.