# Wormhole Whispers: Reflecting User Privacy Data Boundaries Through Algorithm Visualization
## 3 Design Method
### Data Collection  
China has the largest internet user base in the world, with over 1.1 billion users as of June 2024. This figure not only highlights the vast scale of the user base but also positions China as a leading ground for global digital transformation. In this context, users' awareness of privacy is shifting from passive acceptance to active consideration, reflecting a broader global trend among digital users. As such, the study of Chinese users provides valuable insights for anticipating future global user behavior.  
To understand users' psychological attitudes toward privacy data collection on social media platforms, the research team first surveyed key Chinese platforms, such as Weibo and Bilibili, and gathered relevant data. Many users expressed concerns about eavesdropping on these platforms. In China, \"big data\" has become a widely accepted technical term, while \"eavesdropping\" is commonly used to describe concerns about privacy violations. The frequent discussions surrounding these keywords on social media often lead to in-depth debates and experience-sharing among users. Using the keywords \"#bigdata\" and \"#eavesdropping\", the research team collected 685 posts through web crawlers. After excluding irrelevant data, such as advertisements, marketing posts, and off-topic comments, 635 valid posts remained. Data collection occurred on 30 October 2023, and the posts were published between October 2022 and October 2023.  
We also selected the five most popular social media platforms in China by download volume (WeChat (2025 WeChat: Connecting a billion people with calls, chats, and more, accessed on 16 January 2025. [[https://www.wechat.com/en/](https://www.wechat.com/en/)]([https://www.wechat.com/en/](https://www.wechat.com/en/))), Weibo, REDnote (2025 REDnote: Inspire Lives Shares and discovers the wonders of the world, accessed on 16 January 2025. [[https://www.xiaohongshu.com/explore](https://www.xiaohongshu.com/explore)]([https://www.xiaohongshu.com/explore](https://www.xiaohongshu.com/explore))), Bilibili (2025 Bilibili: Southeast Asia's leading anime, comics, and games (ACG) community where people can create, watch and share engaging videos, accessed on 16 January 2025. [[https://www.bilibili.com/](https://www.bilibili.com/)]([https://www.bilibili.com/](https://www.bilibili.com/))), and Taobao (2025 Taobao: Online shopping platform, accessed on 16 January 2025. [[https://www.taobao.com/](https://www.taobao.com/)]([https://www.taobao.com/](https://www.taobao.com/)))) and conducted a comprehensive analysis of their user privacy policies, as shown in Figure 1. This analysis included collecting, organizing, and performing word frequency analysis on the policy texts.  
At the same time, we found that all five popular applications mentioned above have third-party SDK data-sharing lists, as shown in Figure 1. To analyze the sharing relationships of personal data between different software and third-party SDKs, we collected the quantity and types of user information provided by 13 popular software applications to third-party SDKs. Our data sources included official websites and in-app terms. We  
Figure 1: Privacy policy and SDK data collection analysis and visualization flowchart. (**a**) Collecting and organizing user privacy policies of the five most popular social media platforms. (**b**) Collecting and organizing a third-party SDK data-sharing checklist.  
organized and compared the similarities and differences between different software, extracting the frequency of various third-party SDKs appearing under different information requirement categories.