A/C that keeps out the Beijing pollution? Doubt it. Maybe the relatively small number of people at the very top. And even they have to go outside once in a while.
lovely country mansions
Even if they did, you would probably have to go pretty far out of Beijing to get some fresh air in the "country".
No, I think the "high leadership" lives and works in the same air as the plebs.
Some colleagues of mine in Beijing (Chinese both) expressed a mixture of wonder and bitter satisfaction at this thought. Cynicism is intellectual treason.