I've had quite a bit of experience of the best private medical care hk has to offer, and put it this way I'm suing one doctor and making a complaint about another hospital. The treatment received was below the medical standard each time.
I'm currently sat in TKO hospital and, whilst i can't fault the medical care, it took four hours of bureaucracy just to get admitted, and then the level of spoken English not just by the nurses but also the doctors is atrocious. This is day two and is a very isolating experience - staff don't want anything to do with is because we're too much hard work for them. We're stuck in a corner of a room far away from the nurses as possible. Huge coincidence.
OP, if you're coming from France you're probably going to be displeased with the hk medical system. I've vowed never to use hk medical care where it isn't an emergency. My experiences are subjective of course. Others might have better experiences.