I worked for Delter from 2004 to 2007. I got a Z Visa as did all the other teachers I worked with in Beijing. I never heard of one single teacher being given only an L visa and an unfulfilled promise. I was never paid late. While not heavn on Earth I did not encounter those issues myself during those years. Maybe things went down hill later. "It is a scam designed to steal as much money from parents of lazy kids ..." And this makes Delter different from basically every other private (and to be honest public) school in China how?