According to which city you take the exam, Qingdao takes the exam twice a year, once at the end of April and once at the end of September. Generally speaking, the local training school with examination qualifications is the test center. You can sign up for intensive training at the local training school, and the school will sign up at the labor skill appraisal center. You can tell the school about your qualifications, and the school will tell you what qualifications you meet, and then prepare the materials for the exam. There are not too many restrictions.