[Derivative works of A Better Tomorrow + secondary creation of prequel stories + no golden fingers + brotherhood + darkness in the world]
The movie ends abruptly with Song Zihao being arrested and imprisoned. The novel pulls the timeline back to Hong Kong in the 1970s, starting from the Kowloon Walled City where people are mixed with good and bad people: "How the young Song Zihao and Xiao Ma Ge entered the world, and how they became the all-powerful gangsters from the bottom of the gang step by step."