Topic Evolution Analysis in Social Networking Services: Taking Sina Weibo as an Example

Event-related topics in social networking services are always the epitome of heated society issues, therefore determining the significance of analyzing itsevolution patterns. In this paper, we present a comprehensive survey on the tweets about "ransomware" in Sina Weibo, a famous social networking servicesimilar to twitter in China. The keyword corresponds to a global ransomware attack in May 2017, on which our example event-related topics are based.We collect text data from sina Weibo and vectorize each tweets, before using a dynamic topic model to discover the event-related topics. The results of thetopic model are explainable enough and help us to understand the evolution of those topics more thoroughly.