Why does Xiaomi's mobile phone always have fake friend notifications to add information recently?

Please confirm whether you have logged into the same Xiaomi account on other mobile phones and used millet cloud service.

Log in Xiaomi account on your mobile phone and start the cloud service, which will automatically back up your contacts, short messages, call records, photos and other information to cloud hosting. When logging in with the same Xiaomi account on another mobile phone, information such as contacts will be automatically synchronized. It is recommended not to use the same Xiaomi account on different mobile phones to avoid information confusion and disclosure.