Why do the short message records of previous years pop up and other people's chat records appear on my mobile phone?

Opened the * * * enjoyment of iMessage.

Because you have opened iMessage and used an AppleID with others, the chat records of others may appear on your mobile phone at this time. In fact, the people who use the AppleD with you only need to remember to deselect in Settings-Information-Send and Accept, and contact you by email.