The Hong Kong court system has changed quite drastically towards the Communist-Chinese court system where you get convicted if you have been prosecuted for a crime you haven’t done.
Judge Ernest Michael Lin Kam-hung convicted three protesters for rioting even if there was no evidence of them taking part of any such activity, at least in Communist-China they present fake evidence, but in Hong Kong this not even needed.
So what is the requirement to be sentenced in Hong Kong for fake crimes, just believe in Democracy and you will have food and shelter at the prison.
Source: The Guardian, SCMP (Communist News Paper)