IPhone6s Apple Calendar suddenly found something strange.

Messages received by IOS and MacOS devices are pushed by apple iMessage. It was originally used to add friends to contact each other, but for some reason, it was used by criminals. They can fill in the text when the account is invited and push advertisements to the AppleID of ordinary users. If users synchronize the iPhone calendar with the iCloud calendar, they may receive a prompt in the iPhone and display the spam preset by criminals. The same message prompt information will also appear in the networked iOS or Mac OS devices such as iPad or MacBook logged in with the same account. The latest version of Tencent Mobile Manager cleans up calendar advertisements. You can swipe to advanced features in the phone manager, and then select "calendar advertisement cleaning" to clean up.