I think we are very close to a full scale intervention and direct takeover of Hong Kong by mainland China. The riots have caused the closure of the airports and mainland China is not going to tolerate these protests much longer.
In the last few hours they have begun to characterize the riots as terrorism. More significantly, Chinese military units and para-military police units are massing around Hong Kong.
I don’t think China lets these protests go on much longer and frankly I think the students have foolishly handed China a good excuse for taking direct control of Hong Kong.
And China won’t be gentle about it, to be sure. They will slaughter as many people as necessary to get the point across.