Today we received a letter of the City of Arnhem (My lovely city) adressed to miss Zhang and me. It said basically: this is Zhang Feng Di’s personal information and her inhabitant service number. Please read carefully and if it’s not good then call us. the inhabitant service number is necessary to get proper health insurance but it is also needed to have a job and later to pay her tax money to the government .
This means that Zhang Feng Di is officially registered in the City of Arnhem people database and she is an inhabitant now. So this means probably that she is allowed to stay. 
So for now. we are very pleased. The future looks bright and now we feel very secure that it is all going to be just fine