Hello, you can't take the exam in this situation, at least not at present. If you graduated from junior college and need to be engaged in supervision work 10 years, it is not very simple for the company to issue certificates and register for exams, which is not as simple as it is said. If you simply want to be affiliated, the only certificates you can get at present are the second-level construction engineer and safety officer, and you can also be affiliated, but you also need the company's certificate!
I am also a graduate student majoring in engineering cost. I have been engaged in supervision for 8 years now. I'm not old enough to take the exam, and it's almost over! Ha, the supervision certificate is not easy to test, it involves too much!