Group 1 - The core point of the article is that WeChat clarifies misconceptions regarding storage space usage, indicating that for users with over 40GB of storage, chat history accounts for an average of 70% of the space used [1][3] Group 2 - WeChat emphasizes that many features developed based on user needs, such as mini-programs, Moments, and video accounts, generate data that is "cached" and can be deleted without affecting functionality, as this data can be re-downloaded from the server [3] - The company notes that there is a storage limit for cache and an automatic cleaning mechanism in place to manage space [3] - WeChat identifies that the root cause of storage issues for many users is the chat history, which significantly contributes to the overall storage consumption [3]