As a P.R.China Citizen, I was mentioned before that it could be sent from China or Hong Kong.
But probably you did not realise, HK SAR nominally belongs to China, but they're far from same.
You see, if I receive any electronic device in Mainland China, I would pay 10% of import tax(and that's before trading war, now it's maybe 25% something?) on the premises you paid that tax in advance (if using DHL Express).
If you do not pay import fee in advance via DHL, the total cause would be 1.521 times higher than the original price (because in this case, DHL imports en masse and pay 17% VAT an