I went to Cornell, and I never witnessed any sort of collaboration of this sort.
I did have a professor tell us an anecdote of discovering such "collaboration" in his classes and tell us he wouldn't stand for it (and yes, they were Chinese), but that's the only encounter I had.
I did have a professor tell us an anecdote of discovering such "collaboration" in his classes and tell us he wouldn't stand for it (and yes, they were Chinese), but that's the only encounter I had.