During and shortly after the revolution. They fkd around afterwards, father got locked up and family got sent to the rural countryside for reeducation. After serving the prison sentence, his father did eventually redeem himself but it left a mark. This experience in adolescence is supposedly what caused Xi to develop a hard-line reder-than-red Marxist-Leninist world view and aversion to corruption when others he grew up with fell down the liberal rabbit hole. This is at least what his CIA dossier outlined as family background and early life.