A native of Hong Kong, John Chen studied in La Salle College in Hong
Kong up to F5 before he went to US and graduated from Northfield Mount
Hermon School, an elite prep school in Northfield, Massachusetts.
The paragraph is taken from this Wikipedia page. I'm wondering what F5 means in this context.
Best Answer
From the context I'd say it means some sort of study year, as the sentence is talking about John studying till F5 then going to the US to finish his studies.