This isn't so much as a scam but, to inform everyone about a certain recruiting agency. The email address is "pelcc".
This is a recruiting agency that fails to mention in their Ads, that they charge a fee to get you a teaching job! The fee ranges from 25% to 5,000 yuan or more, depending on the salary. after traveling to their office in Shenzhen, I was then given a contract to look at, to see that there would be a fee involved if I should want their help in securing one of their job offers.
Consequently, I refused.
If you don't mind paying a fee to get a job, then there probably isn't a problem with this recruiter, as I am sure they would get you the job. But, I didn't pursue it any further to find out.