this is a culture difference or even can be called a 'culture shock'.
in the uk, it is a common practise to follow the husband's surname.
but in hong kong, in almost all the happily married marriages, the wife does not need to change her surname to follow her husband's surname.
is it really necessary to change the information on the hkid card.
this maybe a simple task of changing the surname, but however this will be follow by the changing of all legal and official documents such as banks, bills etc.
the OP can ask all her friends, in who had changed their surname on their hkid card and passport...i am willing to guess.....for most hong kong bride....nobody will even bother to consider such action in hong kong......why?
because most hong kong chinese people knows, just changing the surname will in the future will require 'evidence' (a letter) from the immgriation office - stating the reason for any change on the hkid card....
with this letter, the bride will have to show it to all legal/banks/uilities - why there is a change on her hkid card.
and this letter is not cheap from the immgriation office.
i hope this has help