F-visa in hong kong or somewhere else?

Hi there. I'll be traveling through Asia next few months and if all goes well I'll be doing an internship in China starting February till mid July. I was hoping to get an F-visa in Hong Kong, but from what I've read online this seems to be impossible nowadays. I also considered applying through mail but you can get summoned for an interview so that might be problematic. I really don't want to come back to the Netherlands to apply, so any tips would be VERY welcome.