AFP and anorexia nervosa: This study examines the relationships between AFP, RFP, family dysfunction, and eating pathology among Chinese adults with anorexia nervosa (AN).<h4>Methods</h4>We employed a two-part design that included a cross-sectional analysis of 144 female adults with AN in Chinese mainland and, within the same cohort, a longitudinal follow-up of 75 patients to examine how filial piety and family dysfunction predict changes in eating pathology over time.