I'll chip in with this side. Aston is one that should be avoided by a wide berth...a near bottom-of-the-barrel gig.

Even if you don't encounter the dishonest possibilities in this chain English mill, you are at best going to find a lousy deal- ho-hum salary, tough schedules, shared housing, etc. etc. etc. A lot of their franchises are in isolated jerkwater cities that will have little to offer a foreigner.

Most Aston schools are franchises, and you'll likely find yourself totally managed at the whim of the corrupt, incompetent, baijiu-swilling butthead who bought the local franchise. The corporate offices aren't really involved in the operation of the schools, at least as long as the money keeps rolling in, and the odds of them stepping in and going to bat for you are virtually nil.

And even if they do...you may well wish they hadn't. They tend to be even worse than the locals.

There are too many jobs in China that are better than Aston. It's not worth taking the chance.