摘要：

Abstract:

【Purpose/significance】 Based on the perspective of urban differences, the study of social media users' location privacy dis⁃

closure is helpful to understand the rules of users' active location privacy disclosure behavior, and guide social media and its users to

realize location-based safe interaction.【Method/process】 A total of 50239 location-based privacy disclosure microblogs from 9 cities

such as Beijing, Shanghai and Shenzhen were selected to analyze users' location-based privacy disclosure behavior from two aspects

of users' location-based privacy disclosure characteristics and users' location-based privacy disclosure texts using content analysis,

sentiment analysis and topic mining methods.【Result/conclusion】 Beijing is superior to other cities in terms of the number of authenti⁃

cated users, blog influence and interactivity index, and there is a strong correlation between regional characteristics and user location

privacy disclosure content. Ordinary users disclose location privacy mainly for the purpose of recording and sharing good life informa⁃

tion disclosure motivation, while other authenticated users have more commercial information disclosure motivation. Mass entertain⁃

ment places have weak privacy sensitivity, and users are more likely to disclose the location privacy of mass entertainment places. In

the context of the epidemic, there is a phenomenon that users actively disclose the privacy information of community addresses and

hospital locations when conducting nucleic acid tests.【Innovation/limitation】 From the perspective of urban differences, this paper ex⁃

plores the active location privacy disclosure behavior of social media users. The limitation of this paper is that only microblog is se⁃

lected for research.