Abstract:Social media has emerged as a central platform for science communication today. In recent years, the science communication efforts of some scientists in China on social media have drawn significant attention and positive feedback. This study examines the science communication practices of academicians from the Chinese Academy of Sciences and the Chinese Academy of Engineering on Bilibili (also known as B Station), using social network analysis to investigate the relational networks formed between academicians and other science communicators, as well as the interaction networks that develop during the academicians’ science communication activities. The findings reveal that academicians’ science communication practices display distinct networked characteristics, including a “strong center, weak ties” structure among communicators and a “strong thematic focus, high dispersion” pattern within interaction networks. Based on these insights, this study proposes a model of “strong thematic focus, weak relational ties, and dispersed network” for scientists’ science communication on social media, offering a new perspective on science communication through a networked and dynamic lens.