Let me give you a reference. I majored in environmental resources and development economics in Shandong University of Finance and Economics. School requirements:
The required total credits are 165.
Compulsory course 102 public course 15 practical course 22 professional elective course 8 other professional courses 18
Different schools have different requirements, just to give you an example.
If you want to know yourself, you can inquire about your training plan in the educational administration system of the school, or consult the counselor or the school directly.
To get a degree certificate, you must complete all the credits, and the fee is already in the tuition fee, so there is no extra charge.