If you are thinknig about coming to China make sure the school sends you a contract by email. Get the Z Visa before you EVEN STEP FOOT into the country. That's something very few school in China will do. Whoever is willing to do that will probably give you a better time. In fact that should go for any country. Any place that doesn't follow these rules are probably to be avoided.

If you can't get a school to do this don't go.