He is married American, works in China. 
If he asks you to add your Skype or Kakaotalk. 
Do not ever add him or talk to him. 
He will teach you English very well but also tell you a lot of lies and pickup lies to have sex with you. Everything he says is LIES. 
Do not ever contact with him or believe him(or you can use it to learn English) 
This is his Facebook. Remember his face and be careful. 
http://www.facebook.com/eric.w.rodgers.3