2211: Five Elements Forbidden Zone

In 2211, after human civilization experienced disasters such as AI rebellion, environmental collapse, and rising sea levels, the population dropped sharply to less than 100 million. In order to maintain fragile stability, the super AI "Luban" enforced a genetic caste system. Humanity is no longer divided into social classes by wealth, but by the genetic totem at birth. This is not only identity, but also a forced binding between physiological structure and occupation.