How does Xiaomi mobile phone automatically delete short messages?

Ios has the function of automatically clearing the expiration date for 30 days, but Xiaomi does not. I guess you, like me, are very upset to see thousands of SMS verification codes, and want to delete them together, but you are afraid to delete all other important SMS messages.

There is a folding notification function in Xiaomi SMS settings, which will automatically put the verification code messages into a notification message, collect the messages that you don't want to delete, and then delete all the others with ok.