Extension of a 90-day L-Visa

I am a German national and live in Beijing since the start of August. My Tourist L is about to expire by the end of October. I know that it is easy to extend the normal 30-day Tourist L, but how about extending a 90-day Tourist L? Maybe even for 2 months?
If this is not possible, does anyone have some information on the application process for a new Tourist L in Hongkong for E.U. citizens? Can I easily get a new 60-day L-type?

Thank you so much for your support!