Hi Mancunian! Yuncheng IELTS' client schools are in the main public senior middle schools. Chances are that an FT working for said agent will be teaching in the public sector. But his/her salary and other monetary benefits will be provided by the agent, not the school itself. Obviously, the school pays the agent, who pays the FT in turn. Teaching on behalf of said agent isn't much different from teaching at a public senior high. There are advantages in that the agent arranges the FT's accommodation and provides a teaching assistant. A further advantage is that the agent knows the situation at each of the client schools, and will try to place the FT in a work environment that will suit the foreigner's teaching ability, and so prevent problems between the FT and the Chinese teachers at the client school. The teaching assistant is there not only to be an interpreter in class, but also to advise the FT what and how to teach so as to keep the majority of his/her students happy with the teaching.
At Yuncheng IELTS, you'll get what it says on the tin! Working direct for private sector employers such as private schools or training centers does not guarantee that. Furthermore, it's likely that the FT's teaching method and interaction with students will be much more under the microscope!

Hello Foxy
You will know better than I do, that Mr River of Yuncheng IELTS is the HEADMASTER; he is called the headmaster and he calls himself the headmaster. Yuncheng IELTS calls itself a school, and as it is private, it must be a Private School. I am sure that they would also consider themselves a centre of learning; the hub, where the spokes connect to state middle schools; so they would also lay claim to being an English Centre. That said, it is of course a first class private school, and would not thank us downgrading it to an agency.