1. First, contact the local education authorities or the enrollment consultation center to consult the enrollment policies and methods of private middle schools to find out whether there is a specific enrollment code.
2. Secondly, contact the private middle school directly and ask whether it is necessary to fill in or provide the specific enrollment code to ensure the smooth progress of the enrollment application.
3. Finally, provide the necessary information, personal identity certificate and education certificate to the admissions institution to complete the enrollment application.