Canglan City is an eastern coastal city where soccer development is uneven. It has both a top-tier professional club, Canglan FC, and lower-division teams on the verge of disbanding, with a soccer culture split sharply between the two extremes. The history is fictional, with no ties to real-world soccer leagues. The domestic soccer league is divided into four tiers: League Three (amateur and semi-professional), League Two, League One, and the Super League. Winners of the playoffs can earn promotion. Gaps in the soccer association's oversight have allowed capital to exert heavy influence. VR neurofeedback training is an emerging technology available to only a handful of clubs and investment groups. AI analytics systems have yet to become widespread, though investors already use them in illicit deals.