oops.. didn;t read your first post...
haha.
i think they tax only boxed Apple products.
by the way, if they really insist on taxing you...
u can just leave your iPhone/iPad at the border.
then collect it the next time u leave China.
i once brought a PC from HK to China via Shenzhen Huanggang.
it's a big tower PC.
the customs stop me and said i couldn't bring it over, then told me personal products are allowed, but not commercial/industrial products.
because of the size of my PC, they deduced it's a office server and need to be taxed...
but because i don't have a receipt for it, they will tax it based on their China Import Tax "bible", which is around RMB 1000+
fucking ridiculous..
so i left it at the customs.
just have to pay a small fee for storage. can't remember exactly, but i think it's RMB30 per day.