If you don't continue your education for three years, it will automatically expire after three years and you need to take the exam again. The three types of personnel refer to the main person in charge of the enterprise, the person in charge of the project and the full-time safety production management personnel. The third type of personnel B certificate refers to the safety officer B certificate and the project leader.

Registration conditions Participants should have a high school education or above and be able to participate in the study and examination normally.