overstay visa fines for kids

hi, my kid overstayed her entry permit due to some applications because the university was not willing to provide a visa form for my 6 yrs old daughter,went to the PSB office but they also had no way of extending her entry permit , as both parents are presently in china we could only let her overstay her entry permit.
we would like to know if there is a fine for children before we are able to leave china.
thank you for your help
Nick