When Hong Kong was no longer under British rule did the citizens lose their British passports?

Forgive me if I use the wrong terms asking this question, I tend to be lacking in the areas of history and international politics.

I assume the people of Hong Kong had British passports? I was under the impression Hong Kong became independent in the 90’s, an assumption of mine, but I learned less than a year ago that Hong Kong is actually part of China. I guess kind of like Guam and Puerto Rico is to America? So, I was wondering, if the people of Hong Kong had British passports, did they get to keep them? Or, did suddenly they lose their right to be a citzen and were issues Chinese Passports? And, is there a Hong Kong Passport?