This paper explores the dynamics of viral social media exposure posts within anonymous online communities in China, specifically concentrating on college students. Based on theories of effervescence and collective frenzy, this research probes into the emotional triggers and functions of group polarization and social identity reconstruction in the digital sphere. Adopting a mixed-methods approach that integrates semi-structured interviews and surveys, it evaluates participants' interactions with online exposure. The anticipated findings are expected to shed light on how factors like group identity, anonymity, and virality cultivate a carnival-like ambiance in social media exposure. These posts function as instruments for mobilization, provide support for social and political causes, and act as platforms for community building and identity formation. They also offer psychological and emotional outlets, aiding users in processing and expressing personal and societal grievances. The paper aims to deepen people's understanding of how digital interactions influence collective identities and social behaviors.