HKMC get a bit funny over $8m.
Be very careful with the HKMC end of things if you're buying over $8m, many have been caught out in the last year or so.
Bank says do it. Sign S&P agreement, pay deposit, wait a couple of weeks, then bzzzt! HKMC says cannot. Forfeit, bye bye deposit
You have to remember you're dealing with a very unsophisticated mortgage market in HK. Make sure you're very very familiar with the process before you sign or pay for anything. Talk to the old boys and guys who've bought recently.
If you're an SO on full whack housing, keep in mind that if your mortgage payment is over 50% of your total monthly income, you can expect disappointment.