The theory and empirical researches of network agenda-setting are relatively mature, but lack explanatory power in the Chinese context. This study takes the "Anshun bus accident" in July 2020 as a case and conducts an empirical study on network agenda-setting to examine its explanatory power in the Chinese context, exploring the relationship between media agenda and public agenda, as well as the interrelationship between different media agendas. Using Weibo as the research platform, 64 media reports from central official media (People's Daily), local official media (The Paper), and commercial media (Sina News), as well as 1280 Weibo comments and replies are analyzed for content, and co-occurrence matrixes of media and public attributes are formed. The QAP function in UCINET 6 software is applied for social network analysis to test the correlation between agendas. The study reveals that all three types of media have network agenda-setting effects on the public, with official media having a stronger effect than commercial media. At the same time, official media agendas are likely to affect commercial media agendas.