This is a story about an illegal life, about a girl whose life is difficult and her future is confused, but she is always motivated. Some plots tend to be depressive, but just like a song, "I also thought about it being over and done with", it is better to live an ignoble life than to die. I have always believed that it is better to live an ignoble existence than to die vigorously. Just like Cheng Cheng in the book, he lives a peaceful and ordinary life.