up on relationships (Homans, 2009, p. 1), so that relevant researches about relationship began decades ago (Vangelisti & Perlman, 2006, p. ix). Leader-member-exchange (LMX) theory is a kind of leadership style, which pays attention to a dyadic relationship between leader and member (Graen & Cashman, 1975; Graen & Uhl-Bien, 1995, Breevaart, Bakker, Demerouti & Heuvel, 2015; Wilson, Sin & Conlon, 2010). There is a long time history that people began to research the relationship between a leader and follower