Operations in Class

There is such a sentence in the document:
"Operations on classes are always executed in the caller’s address space, that is, operations on classes are local operations."

I am confused does it means operations of class only invocation local functions? But I have been succeed do a remote call via operations of class.

You are confusing operations on classes with operations on proxies. If you invoke on a proxy, then this does a remote call. If you just invoke on a class instance, then this is a local call.

Oh, That's it!