How is the supernumerary teacher of Yangzhou Meiling Primary School?

The supernumerary teacher in Yangzhou Meiling Primary School is not good. The supernumerary teachers recruited by public schools are temporary teachers recruited by the schools themselves, usually called substitute teachers. Substituting for teachers, as the name implies, is to temporarily replace teachers. His recruitment has nothing to do with the government, and he does not sign any agreement with the school. Once the government recruits the staff to fill the post, the temporary substitute, that is, the supernumerary teachers, will leave their posts, so it is unstable.