I recently contacted the Davis company in Tianjin asking if they could provide legal working status.
Someone replied and assured me that they were in position to offer "all the legal documents".
According to the posts here, I am certainly not going to take a chance with these people.
I am still amazed at how the Chinese treat teachers who are just looking to do their job and help children learn a foreign language.
Judging from the reputation of many "schools" they are certainly rotten hosts.
Peter Edwards