Why are you in a hurry to blow the whistle on the company? At worst they may be acting irregularly in the same way as many schools in China do. And that doesn't mean they won't come up trumps for your young friends; in which case why then would you want to make trouble for them and possibly undermine your young friend's job whether they connect her to the outcome or not?

You smell a rat! Me too. I had done so as soon as I read his first post. 'Worried' is a bullshitter in my view. If he blows the whistle, the damsel in distress and her fellow bogus teachers could all be rounded up and deported.