I know that a Polish couple were initially teaching on F visas in a Yuncheng county

I knew them, nice couple with a young family.

They had to leave. Non-native speakers of English are now not allowed to teach in China, and Shanxi is enforcing this.

I don't know about the Koreans or Ukrainians teaching language or art at the university. They, and the Russians working other fields. all seemed to leave about a year ago when this crackdown began. June is when contracts end, and most people do not stay in town over summer but spend their salary travelling.

The counties that decided 'no more English teachers' were Ruicheng towards SanMenXia and XinJiang up north. A couple of them came through my town when their school decided 'no more foreigners'. The XJ crew moved into Yuncheng, some got jobs.

One guy from there got married to be able to stay His wife them proceeded to have affairs with every.single.other.foreigner.in.town. This 'bad wife behaviour' is not uncommon Yuncheng among those who married a foreigner.