Getting a HK passport is all about following the proper process
First, fill in the right forms - then be willing to give up your present nationality when necessary

There is a lot of confusion in our community about who is and who is not eligible for a Hong Kong passport, and how to get one if you are not eligible.
Unfortunately, readers of an item in last Wednesday's Public Eye column are not going to be any wiser and may, indeed, be more muddled than before.
The Hong Kong passport states that the nationality of the holder is Chinese. Most people born in our city are Chinese nationals ab initio.
Those who hold another nationality, whether born here or elsewhere, can apply for Chinese nationality under the Nationality Law of the People's Republic of China.
Section 7 provides three possible routes for non-Chinese to acquire Chinese nationality. They are: close relative (not defined) of a Chinese national; long-term (not defined) resident of China (not defined, but clearly including Hong Kong); other relevant circumstances.
In theory, only one strand needs to be established, but in practice the Immigration Department looks for as much evidence as possible under all three.