Pretty sure it is a
Golden Silk Orb-Weaver now, particularly
this one.
Another link:
http://www.hiking-hong-kong.com/hong-kong-spiders.php
Turns out it's not poisonous at all. Wish I had known that, it would be pretty rad to get a picture of one on my face
But then again, 2cm fangs "Their bite is compared to a bee or wasp sting, no doubt due to those large pincers on their bodies"
I take it back!
I made a joke that they must eat birds... turns out they do!