Do you have any actual examples of their poor academic behaviour, or are you just speculating? Because it sounds like you're singling them out for being Chinese right now.
A quick Google shows this example article. Many more if you want to research this topic yourself vs imply someone is simply being racist: http://www.smh.com.au/national/education/academics-accuse-un...
And I get what you're saying, and I'm not trying to tar all international students as doing this. More so it's a good topic to discuss, to stop this behavior and protect the reputation and achievement of those students that do work hard and truly earn their degree and other academic accolades. But at least at Australian universities this is a massively widespread problem, which uni's dont want to seem to deal with and it would not surprise me if this was more international.
Edit: Spelling
Also, having been through university myself, cheating is completely widespread through domestic students as well. I'd like to see some statistics that international students cheat more, rather than anecdotes.
The issue goes to the fact that grades/school prestige are being used to imply that a student will be a solid addition to a company, yet everyone wants to espouse "Meritocracy" - not realizing that only comes after you're in the "real world" and you've got a few years worth of jobs on your resume/CV.
In life, as in classes there is the way the book tells you how it SHOULD be, and then there is the reality of how it actually is. Sadly, students are unprepared for what they will experience in the "real world". Part of it is the school's fault, but also the students bare some responsibility when they insist on wearing rose-colored glasses.