Hall's encoding/decoding model has been widely used in mass media, but its potential in social media studies has not been explored thoroughly. To this end, this paper aims to broaden the fundamental principles and assumptions of the model and apply them to audience engagement and interaction in constructing cultural meaning through social media. By analysing the YouTube channel of Liziqi (Vlogger), this study adopts a two-stage content analysis to investigate the possibility of textual coding frameworks and audience engagement processes in the construction of cultural narratives. The study reveals that Liziqi represents Chinese culture through various symbols and constructs a micro-narrative coding framework that influences audience perceptions. The audience interprets the content in proactive and diverse ways, resulting in four types of decoding: pleasuring, reflective, empathic, and questioning. This research expands Hall's encoding/decoding model by exploring the production and reception processes in a multicultural context, revealing a shared cultural framework between sender and receiver. This paper provides a tool for scholars to use new conceptual tools for encoding/decoding to explore the meaning dimensions of social media interaction.