jrkob Yes, she was on a visitor's visa working illegally in HK but she had only been in HK a few days.
From what I heard, she gets one month in jail until sent back to her country. Can't remember how many years she will get blacklisted from coming back to HK but should be somewhere around 3 years.
Working on a tourist visa sounds more like a working girl, police isn't going to be nice about it.
The advantage of being arrested right now is between all the arrests for the protests, and the present coronovirus crisis, they just want you gone, prisons will soon be overrun by protesters. So my guess is that they will just deport her pretty soon (before Thailand won't accept anyone who has been anywhere in China, including HK). She wasn't working for years or forged documents or anything, for people doing it for longer or with forged or stolen HK IDs, seems to be a bigger deal (from the case posted above).