...agent with an office opposite the main bus station...

That one is the third. A few schools are hiring directly and one long time foreigner is sometimes doing placements as well. So one could say four if one were imprecise.

The foreigner with no visa is still waiting for their visa, after over 5 months of having their passport sit on a desk at the Yuncheng Public Safety Bureau. I am surprised they continue to work, and are still in the area. This foreigner, btw, has been working as a dutiful employee for many, many, years in the same town.

June, end of contract season, is in 2 weeks and that teacher STILL does not have their passport with visa?

I can see why this is so - if the PSB are arresting headmasters, then it is going to make working as a teacher at that school very difficult and cause the local PSB's to be harsh with any teachers associated with that school, area, or placement agency.

If the headmasters are arrested, in jail, imprisoned, and telling all, then Yuncheng EV, Yuncheng English Village, as well as other local agencies, may be under suspicion as well. I repeat, may.

Recap of recent events:
-No passport with visa for an entire school year.
-Headmasters arrested and telling all about everyone they did business with.

There are other places to teach, other than at Yuncheng, Yuncheng EV, and Yuncheng English Village.