You can graduate with full credits and get a degree certificate. Now CET-4 is not linked to the degree certificate. Even if you don't pass the school, you will be given a degree certificate.
But your certificate is different from the graduation certificate of the students in this department. There will be chapters of three universities you are studying!
If you want to take the postgraduate entrance examination, you must dig hard ~ If it is an interdisciplinary postgraduate entrance examination, you really need to study by yourself! Hmm. How interesting
Good luck ~