Generally speaking, the application conditions of different grades are as follows: the personnel participating in the primary appraisal must be on-the-job employees or graduates of vocational schools who have completed their apprenticeship; The personnel participating in the intermediate appraisal must be graduates of technical schools and other schools who have obtained primary skill certificates and have worked continuously for more than 5 years, or personnel who have been approved by the labor administrative department to train intermediate skills.
China's vocational qualification certificates are divided into five grades: primary (level 5), intermediate (level 4), advanced (level 3), technician (level 2) and senior technician (level 1). You can go to a professional professional appraisal institution or a qualified school to register for the exam.