Through the growth process of takeaway delivery boy Tang Long, a theme is revealed: true strength is not to conquer others, but to conquer the fear and greed in one's own heart; true success is not to stand on the top, but to lead a group of people from darkness to light.
Tang Long used the wisdom of the Book of Changes to survive the bloody gangs, the boundary between light and darkness of human nature, and finally broke into a bright future. The starting point of all this is just a yellowed Book of Changes and an old man's entrustment before his death.
As Feng Bo said: "The Book of Changes is not a fortune-telling book, but a book that teaches people how to live." Tang Long learned how to live and taught others how to live. This is the core value of this novel.
