For an ebony escort in Hong Kong the word describes appearance and nothing else. It comes from the way this trade writes about itself rather than from anything official, and a woman advertising as ebony in Hong Kong can be of any nationality at all, and the word will not tell you which.
Ask her, or read her own advert, where the country is stated separately. Reading an origin into the word ebony produces a guess, and a guess is a poor thing to build an evening on.
If none of the words fit what you had in mind, start from the whole Hong Kong selection and read instead of narrowing.
The 59 profiles here were gathered by looks and not by passport, which is why their nationalities vary while the look does not. The hour runs from HK$ 1,800 to HK$ 2,750 — the same width as the city as a whole, so choosing this page costs you nothing and narrows nothing about the booking itself.
Nothing on her page is written in her voice, so the first message is where the evening actually gets arranged. Four lines cover it, and they get answered faster than a long one.
What not to open with: her real name, her origin as a test, or a negotiation on price. The first two get short replies and the third usually gets none — a woman advertising at the going rate hears an opening offer as an argument, not as interest.
