I have observed the same. In my masters, Chinese friends were asked to join meetups and classes for improving english speaking. When I asked how they cleared Toefl(https://www.ets.org/toefl), which is required along with GRE score for getting admissions into US university, they mentioned its very easy to buy these scores. Somebody appears on their behalf in the test.
Judging by the cars some Chinese students drive, it appears it's very easy for them to buy anything. McLarens, Maseratis, Ferraris, top-end models from BMW, Mercedes, Porche and Audi are not uncommon around campus and it's always a Chinese kid at the wheel.
