Suddenly I received a short message: You paid XX yuan with Alipay, and the check code is:

First of all, you have to determine whether you have opened Alipay. If not, someone else's Alipay mobile phone number was accidentally set to your mobile phone number. If you open Alipay, you should make sure that someone is using your Alipay to buy things, or you are using it yourself but don't know. It's possible.

I hope it will be helpful to you and I hope it will be adopted.