In many Chinese family structures, if an adult continues to live with their parents long after getting married, psychological problems will sooner or later arise. It’s not that “living together itself is problematic,” but rather that the parent-child relationship often remains stuck in a pre-modern hierarchical structure that has not undergone a complete reconstruction: parents psychologically assume the right to interpret and manage, while adult children, even if fully capable of independence, are constantly pulled back into the “child role” through high-frequency daily interactions, resulting in ongoing interference and reshaping of life decisions, emotional expression, and boundary setting. When this role mismatch persists over time, an individual’s sense of autonomy is chronically eroded. Until this structure is rebuilt, the probability of psychological conflict significantly increases, and separation is often the most direct way to reduce the frequency of such conflicts.