You can't. The main person in charge of a construction enterprise needs a college degree or above. Except for enterprise legal persons, all others need a first-class builder's certificate and an enterprise letter of appointment. The continuing education of safety officer B certificate is very simple. After studying for 2-3 days, you can't take the exam by yourself. After passing the examination, you can stamp the certificate and extend the time. When the certificate expires, the enterprise will contact the issuing authority, usually the local construction department or the Construction Committee to organize and implement continuing education.