This study conducts a multimodal discourse analysis of the live streaming of Jiaqi Li, a well-known Chinese streamer. Integrating systemic functional grammar and systemic visual grammar to explore the construction of interpersonal meanings in Li's live streams, the authors found that Li uses verbal semiotics to convey information and feelings and, more important, to create his different interactive roles as an authoritative opinion leader, a protector of consumers’ benefits, and a friend who shares his experiences and recommends products. This study offers insight into e-commerce discourse and communication, adding to the literature on live streaming in commerce and business communication.

In the information age, discourse plays an increasingly important role in promoting innovative products. But how language works in the innovation process remains underexplored. This study explores the discursive communication strategies used to introduce innovation by analyzing the content, cohesion, and coherence of product launch presentations by Steve Jobs. It reveals that such discursive communication strategies improve the audience’s understanding, recognition, and acceptance of innovative products. This study contributes to both business communication studies in general and research on innovation communication in product launches in particular.