Hello, uninstall DingTalk, reinstall, or change the phone number, replace the mobile, change the login password, etc., the data won't be deleted, unless you delete the account or manually delete the data.
Tips:
Replacing the mobile phone, uninstalling and reloading, etc. will delete the local cache data. The chat records will be saved in the cloud server for 360 days and can be cached up in the chat window.