That's called an allegation, an assumption. And alleging students said some dumb shit is different than proving collusion with PRC gov unless Purdue can dig up files from PRC MSS. In the meantime, the parsimonious answer is kids playing with PRC cancel culture, because to my knowledge there hasn't been a single proven allegation of PRC kids directly reporting other PRC nationals on western campus. Plenty of yellow journalism alleging collusion from the last few years, but zero expulsions despite China Initiative cracking down on campus harder than ever. That should tell you something. If anything I hope Kong / Purdue hits up the proper authorities and finally get some clarity on the extends of the issue other than non-stop news cycle weasel allegations. IMO the likely outcome is dumb kids trigger cancel culture drama over social media, and again free speech =/= freedom from consequences in other jurisdictions.