Please write a micro-novel! It was always looking out of the window on the train, but in fact, there was his shadow on the glass.

I once read a micro-novel on the train. The content is as follows: On a long-distance train, there was a young man who was always staring out of the window. He seemed very focused. From time to time, he gently stroked his reflection on the glass as if he was admiring a piece of art. His companions always asked him curiously what he was doing, but he didn't care and just looked out of the window silently. One day, his companion could not help but ask him,"Why do you keep looking out of the window?" The young man looked up and smiled." I like to see the scenery outside. It feels like the world has changed." Although I don't see my own shadow on the glass, I believe that my shadow must be traveling on the train as it travels." His companions were surprised to hear this. They couldn't imagine that a young man would like to look out of the window instead of sitting on the train. From that day on, the young man no longer just looked out of the window. He began to seriously experience every corner of the train and feel the surrounding environment. He learned to appreciate the beauty of his surroundings and discovered that he could explore the world so much. At the end of the story, the young man looked out of the window and said with a smile,"Although I don't have a shadow, I can create my shadow on the train and feel the changes in the world."