I see I see. Thanks for the reply it is clear now

What about entering another country that I am not a citizen of (say a country in africa), can I use my HKSAR passport over my US passport when entering that country even though I am flying from the US? The reason that I might want to use my HKSAR over my US passport for some countries is because some countries you don't need a visa with your HKSAR passport but need a visa if you use the US passport..