This post is rather strong and unsupported by any facts. There is nothing illegal about at an will letter of employment, and so I would ask what the real issue is with this group.

Does this group have schools in Guangzhou, Shenzhen, and Changchun?

Are students really enrolled in AP and IB programs to attend schools in the USA?

In what way does the company act fraudulently?

Claims such as those made in this venue should be moderated and based on fact. I wish to know what has happened, as I have accepted an offer by this group.