China worried about their oil in Iraq. Maybe they want to launch an Operation Iraqi Liberation of their own. They're already threatening war on every side of their border so they might as well reach over it. Don't want to limit yourself to geography after all.
http://in.reuters.com/article/2014/0...0EO22D20140613
http://in.reuters.com/article/2014/0...0EO22D20140613