This so nice sounding school is the one you should beware the most. They are well known for keeping your passports and using them for illegal activities. The "official" contract has at least 2 different names for the school, but if you call the numbers on the front page, they will answer somewhere else in another school with no relation whatsoever to them. You will be sent to teach to the countryside for an hour (but it's 2 hours to get there, plus 2 more to go back, but it only counts as an hour taught). They will get into your apartment and steal things from you "in order to assure you don't quit", because everybody there is looking for the chance to get their stuff and flee. Going to the police of Foreign Affairs Bureau is less than useless cause they know almost everybody there (there are lots of good guys at the Bureau, but they are hard to reach) and instead of processing your complaint they will call the school to get someone there to talk to you. Oh yeah, and if you happen to succeed on this they will call you and threaten you to dead, they will send gangs to beat you, and will use fear as weapon to keep you silent. I know cause not long ago we made a strike and a good 20 teachers left right away.
Another reason why they keep your passports is s that you never realize you don't have a working permit. They just go on renewing your business and Tourist visas.

So teachers, be careful when you come to China, try to stay far from Dongbei, things are backwards up here, or at least choose carefully and don't be surprised if you have to perform a midnight run.