<p>In social information processing, individuals show “we-prioritization” toward information related to their in-group. Further, in-group favoritism may be more salient in collectivist cultures (e.g., Chinese culture). Nevertheless, the question of whether “we-prioritization” exists in collectivist cultures needs to be answered through empirical research. Using electroencephalography during a perceptual matching task, this study examined whether participants (<i>N</i> = 42) from collectivist cultural demonstrate “we-prioritization” effects. The results confirmed a tendency for “we-prioritization” among the participants; information related to “we” had shorter reaction times, higher accuracy and sensitivity, as well as more lenient decision criteria. Moreover, event-related potential (ERP) analysis showed that information related to “we” induced greater late positive potential (LPP), providing some support for “we-prioritization.” Furthermore, microstate analysis showed that “we-prioritization” could be reflected by: (1) enhancements of the corrected duration of Class C and the occurrence and contribution of Class D under the “we” condition, and (2) enhancements of transition probabilities between Classes C and D, as well as between Classes B and D under the “we” condition. The results show that “we-prioritization” in collectivist cultures is not only related to the overlap of individuals’ self-in-group representations but also reflects individuals’ affective preferences and value enhancement of in-group-related stimuli. Using a perceptual matching task, this study combined ERP analysis and microstate analysis to demonstrate the cultural universality of “we-prioritization” in a collectivist cultural context, and revealed its neural mechanism, providing empirical evidence for explaining complex social phenomena, and offers a cognitive explanation for enhancing team cohesion, sense of belonging and reducing intergroup conflict.</p>