My former room mates were from China and I was really surprised to learn that they supported the Great Firewall. They didn't seem to have any issues with it and even thought it was for the greater good.
I find it unlikely that Chinese rulers would want to send abroad anyone but its loyal opposers of democracy.
wow. I don't even...
If you are the son/daughter of a semi-high ranking CCP member the government will heavily vet you (assets, study program, where you intend to go). This is because of the "naked official" problem where corrupt members send their child out and then transfer illegitimate assets/cash out to the foreign country.
But your average chinese exchange student just has middle class parents who have just sunk their life savings into securing a better future for their child... that's it.