If I bought a new iphone 14 pro in China, is it able to use in Newzealand?
For example, the size of SIM card, or other things I need to take notice?
The size of the SIM Card remains the same in all iPhone 14 Pro across the globe except in the USA where there are no SIM Trays.
If you buy an iPhone which is not locked to any Carrier in the country of purchase then the iPhone can be used anywhere in the world.