[Objective]This paper studies the dissemination of public opinion over the social media, with the purpose of improving government management and decision making. [Methods] We set hypothesises of information dissemination with the 5W communication model and agenda setting theory, and then conducted correlation analysis to data from Sina Weibo. [Results] We found that the opinion leaders posed more impacts to the communication results. There was positive correlation between the attributes of micro-blog posters and communication results, while the correlation between volumes of disseminated information and the results was negative. [Limitations] We only chose one single topic from a specific period of time to conduct the empirical analysis. [Conclusions] This study could help the government, news agencies, and large enterprises understand the impacts and influencing factors of public opinions dissemination.
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