This is the regret of the author and the subject when they were in college. Four months after the breakup, the author traveled across China and took a slow train alone to the prairie of Inner Mongolia. During this period of time, the author recorded his life and elaborated on his life in the past six months in the first person and third person. He also grew up under the baptism of time. Now the author has transformed and become the person she liked back then. It's a pity that he didn't accompany her along the way, she didn't know what he looked like, and the two of them drifted apart.
Purpose: The author planned to write down every moment he had with her in the form of a novel within one year after the breakup, and gained new insights and inspiration from the long record.