WeChat chat records are stored on the cell phone. If you don't change your cell phone and don't clean up your chat history, then the data will always be saved. The chat records in WeChat on your cell phone, such as pictures, text, voice, etc., are usually saved all the time, and if you delete the chat records, there is no way to view them. Chat records can also be saved through the migration function, just save a shorter time, only a week's time, if you newly migrate the chat records, it will be the previous chat records will be covered by the migrated chat records will be uploaded to the server, you can choose a friend chat records, you can also choose to migrate all the friends chat records. After WeChat is logged out, you can still use this account the next time you log in to WeChat without deleting any historical data. After uninstalling WeChat, the chat history will be deleted. If you reinstall WeChat, the previous chat history will not be displayed, and if you update WeChat, the previous version will be overwritten, and the chat history will still be saved on your cell phone WeChat.

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In response to the issue of WeChat's information security, WeChat has declared that: First, WeChat does not store any of its users' chat records. First, WeChat does not keep any records of users' chats, which are only stored on users' cell phones, computers and other terminal devices. Second, WeChat does not use any of the user's chat content for big data analysis. Third, because WeChat does not store and analyze the technical model of the user's chat content, the rumor that "we are watching your WeChat every day" is purely a misunderstanding.