You have to go to the training center certified by the State Administration of Work Safety to sign up for the re-examination exam. After passing the examination, you can apply for a review of the electrician's certificate. Electrician professional qualification certificate is the proof that workers have the necessary knowledge and skills to engage in a certain occupation. Electrician's certificate is the qualification certificate for workers to apply for jobs, take up posts and start businesses. It is the main basis for employers to recruit workers, and it is also an effective certificate for notarizing the skill level of overseas employment and foreign labor cooperation personnel.