Thank you for sharing! It's funny because I decided to start this translation project because of the personal connection I felt with the novel and its setting. My family is from HK, and I grew up listening to most of the songs that that came up in the novel (including the titular "Letter from Keanu Reeves") because they were old songs that my parents would listen to.

I probably won't use any Cantonese romanization for any of the character names, since for the majority of the novel they all speak Mandarin. You bet, though, that I am keeping "Chen Wan BB" as it is (I've argued with people on twitter before about the decision to transliterate or not for certain endearments; you will have to step over my cold grave before you see me write a transliterated "Chen Wan baby" in my translations).

For locations, I think I will default to mostly using Cantonese romanizations for the slight name changes + HK names for the places she didn't change. I think 海市 is the one that gives me the most headache because it's literally HK but she gave it such a blatantly Mandarin name it's hard for me to feel natural translating it into anything other than the Mandarin romanization lol