Most areas before the license 3 months to 1 months after the license is free of charge, a few areas before the license 3 months to 3 months after the license is free. It is recommended to open a time distance between the pre-marriage examination and the wedding date, so as to avoid delays in obtaining the certificate if there are problems with the examination.
In addition, not all projects are free, some projects need to pay their own expenses, they can choose to do or not to do.