Dazel, I was thinking along similar lines. If Hebei had wanted to reprice the deal or squeeze the lemon more, they probably would have done it before government approval.
But the Alderon people aren't patsies, they probably have made it clear to Hebei that if they didn't want the deal, they had other suitors waiting in the wings. So chances are that as much pressure as Hebei can put on Alderon, ADV can dish it back to them, which is why they got the deal they got.
Just speculation, but it sounds likely based on comments from the ADV CEO a few months ago (something along the lines of: "we could get a deal right now if we wanted to, but we're waiting for the right deal").