Is it actually called "chinese food" or is that the cuisine?

I'd say it's a school. It's for students up to the age of 18 and is roughly equivalent to what you'd call "high school" in many other countries.
This page on the Wiki says UK colleges should be tagged as school: amenity=college

Perhaps you can also use the following tags to clarify what kind of school it is:
isced:level=*
min_age=*
max_age=*

What do you think?

So that's how you do it. Fair play.
Cheers!

A college is a school in the UK. A college is only a university in the US.