I think if you run a search on this website for China TEFL network you'll find that previous employees have made several posts about this recruiter.

I have no experience of them myself but what prompted me to answer was that the title of your post was 'Zhejiang Univeristy'. I may be wrong but a quick look at the China TEFL network website makes no mention of the Zhejiang Univeristy Zhejiang Da Xue commonly known as Zhe Da which is one of the more established and highly regarded universities in the country. There are lots of postings on China TEFL network for Zhejiang University of blah blah blah. This pattern is the same in any province in China so you should always be careful and make sure that you know exactly which institute it is you are going to be working at.