Frank Zhang (Waibadan) has provided excellent agency services to non-native speakers of English and unqualified foreigners seeking EFL posts in China over the years.
Actually, his services have been a godsend to those two groups over the years, though he has been unfairly maligned at times for having been unable to find many of them work in China's big cities other than 'monkey work, ie at training centers. The ongoing problem is that qualified native speakers of English compete in droves for decent jobs in cities like Beijing and Shanghai, ie positions as foreign teachers of English in the public education sector there. So, Waibadan has had no choice but to place many of his foreign clients in schools/universities in the backwater areas of China.
Incidentally, Waibadan has been operating under the name of Sangxing for some years to date. He has proved himself to be a good agent for me - he's as honest as the day is long!