Be aware that if you buy in China you will not qualify for AppleCare+ support in Europe. That rule once was only applied and enforced on iPhones and iPads; it has now been extended to computers as well. See section 4.1:
https://www.apple.com/legal/sales-support/applecare/applecareplus/2205/220606_applecareplusmac_us.pdf
Warranties for other countries show the same language regarding limitations.
Also, unless you buy from a 100%-known Apple-owned store (not "Authorized reseller") chances are you will not get a new computer or worse, a counterfeit unit.
In over 20 years here seeing posts from all over the English-specaking world, what you propose makes me VERY nervous. I find the phrase "authorized reseller" loosely used outside the US, to the detriment of buyers. Why suffers when you don't need to?