Well said, Edward!

Frank Zhang (Allen Zhang, David Zhang, Sang Xing, Xu Hui, Mary Wei, Alin Buuer, and many, many others) is easily the most hated and feared name in Chinese EFL. And with good reason...he's nothing but a scam artist who would send his own grandmother to the Mongols if it made him a few kuai. Avoid this person like the plague.

Better still, don't use any recruiter at all. Always deal only directly with the schools doing the hiring. Recruiters have a terrible record of not living up to promises and contracts, and generally are touting lousy jobs (or jobs in horrible cities) that the schools quite understandably can't fill on their own.

It's not hard to find job listings posted directly by schools. They're found on many, many websites. Avoid job ads that aren't specific about the name and location of their school, or that offer "many opportunities"...these are some of the ugly marks of recruiters. If you are contacted by a recruiter, simply delete the mail and don't respond.

The schools in China are dodgy enough all by themselves. You don't need to add this layer of useless, unscrupulous, parasitic sludge to the process.
And Frank Zhang is the sludgiest of them all.