Great story Mark!!
A few comments regarding Hong Kong:
1. I'm a little bit (mind you, just a little bit) concerned over the Return of the Crown (I came from Hong Kong, afterall), but then again, I would prefer that over what was perceived to be Chinese Government meddling of our internal affairs
2. There's not much land in Hong Kong that can provide bases for the Hong Kong Defense Force (HKDF). Here are some possibilities:
a. Shek Kong Airfield or Kai Tak Airport for air elements (Chek Lap Kok can be turned into a military/civilian airport if needed, I guess)
b. Stonecutter's Island for naval units
c. Stanley Barracks for ground forces
d. HMS Tamar as the HQ, with commando units stationed nearby (possibly evolved from the police's SDU, Special Duties Unit)
Marc A
P.S. all installations above are currently used by the People's Liberation Army Hong Kong Garrison