There are two possibilities.
1. This machine is not new.
2. Apple will sample test some machines before leaving the factory, so there will be step-by-step data (Apple told me after sale). You can find a third-party webpage on the Internet where you can inquire about the factory information of mobile phones, and inquire about the factory date of mobile phones through serial numbers. If the last count data in your mobile phone happens to be within the factory date range, this inference is verified (such as in my mobile phone), otherwise it is hard to say.