I think it's safe to say the Peters English School/Center review was written by Peter himself, who is Chinese, and runs the school. Last I'm aware of he taught there as well. He was the only teacher. I doubt he employes foreign teachers at all, though maybe he does by now, though it seems highly unlikely that he'd have the wherewithal to attain working Visas for teachers.

There's no reason at all to go to Hanzhong, so it doesn't matter if there's a possible alternative to teaching at the Aston school there.

As for the Aston school there. Give it a pass. You could do better throwing a dart at a map of China, going to the location, and working at the first school you came across. This one's sub-par.