Sorry for the delay in replying. Great question though.
Here's the thing about Hong Kong. You need to start by asking the question, from the perspective of Beijing, is Hong Kong a foreign or domestic jurisdiction? The answer is YES.
Hong Kong will be viewed as foreign when it suits the purposes of Beijing's overall agenda and domestic when needed.
As I see it, there is a desire to remain somewhat on top of the entire Bitcoin landscape, but to only do so in a controlled setting that resides outside the easy grasp of Mainland Chinese. It is for this reason why developments look to be inconsistent. It might look that way to outsiders, but for Beijing there isn't any inconsistency.