“…In this study, drawing on the conservation of resources theory (Hobfoll, 1989(Hobfoll, , 2001 and crossover of resources model (Hobfoll et al, 2018), we argue that humble leaders can actually transmit energy as resources from resource caravans to subordinates via a crossover process, "a dyadic interindividual transmission of psychological states and experiences" (Hobfoll et al, 2018, p. 108) and thus sustain subordinates' proactive behavior. Specifically, we proposed that leader humility, characterized by its relational orientation and serves as a relationship builder (Nielsen et al, 2013), can boost subordinates' relational energy (i.e., a heightened level of psychological resourcefulness and fulfillment generated from interpersonal interactions) Wang et al, 2018), which in turn, sustains employees' behavior for bringing about changes (Parker et al, 2010). To examine our hypotheses, we focus on subordinates' constructive voice, a type of proactive behavior involving employee's communication of ideas, suggestions, and concerns about work-related issues aimed at change and improvement (Morrison, 2011(Morrison, , 2014, for several reasons.…”