Ivy Education is not a licensed school and consequently uses illegal foreign teachers. There are two schools which they currently affiliate with: Qidong middle school and Taiyuan number 5 middle school, operating "AP" programs. They are a shadow company operating around the fringes of the law, and great caution should be used in any dealings with them.
I should have known better, but I trusted a few people and let my guard down. They do pay well, but have no ability to get anyone a visa, despite what they say in their ads or to your face. Just hired another teacher in Taiyuan on a tourist visa. I had one semester remaining on a residence permit and was lured by the salary. Very polite, evasive and great con-artists. Note: There are several companies in China using the name "Ivy Education", and some of them may be legit.