How are the levels of optoelectronic instrument operator certificates divided?

1. Junior certificate. As long as you are over 18 years old and have a junior high school education or above, you can apply for the junior certificate.

2. Intermediate certificate. For the intermediate certificate, you need to be 20 years old or above, have a high school degree or above, and have worked for 2 years before you can register for the exam.

3. Advanced. For advanced certificates, you need to be over 22 years old, have a college degree or above, have worked for at least 4 years, and have won the first prize in the over-level competition before you can sign up for the exam.