3 round trips you'll have platinum status, 4 round trips you'll have 1K status. Neither status will necessarily afford you guaranteed upgrade availability.
" Premier members will earn two Regional Premier Upgrades upon meeting all qualification requirements of Premier Platinum status, plus two more upon meeting all qualification requirements of Premier 1KŪ status. An additional two Regional Premier Upgrades will be awarded for each 25,000 Premier qualifying miles "
You can request to apply one of these RPUs to each of your domestic legs. You'll pick up 2 RPU's every time you do a round trip to HKG (27,656 PQM each, nonstop -- more if you fly in full-fare J).