Barely a response. I'll tackle the "secret 'police stations'" bit (Safeguard Defenders report) since it has already been addressed by the Paul Tsai China Centre of Yale.

Some of them get politically activated whilst they are here, and with a bit of a break from the brainwashing they realise what they are living under at home, maybe they say the wrong thing within earshot of one of the many party spies planted at their university. Maybe nobody ever sees them again.

"Maybe nobody ever sees them again", prove this. "Maybe this happens then maybe this happens then maybe (maybe) this happens" isn't an argument. If China is forcing everyone to agree, wouldn't 100% of respondents in non-govnt. polls say they completely support the party/government at all levels, at least after a couple trials of rooting out the dissidents? It doesn't make sense (the Harvard study also refutes this mode of analysis, but this was ignored of course). I've shown you to be incorrect repeatedly [1] [2], and yet none of this is addressed.