Introduction The Twenty-Eight Mansions (Ershi Ba Xiu) form the foundational star system of ancient Chinese astronomy, astrology, mythology, and Taoist cosmology. More than a celestial coordinate system, they became a complete cultural framework connecting timekeeping, divine order, astrology, feng shui, ritual magic, and spiritual belief. The word “Xiu”宿 means “lodging place,” referring to the celestial […]