Candidates can be trained in the city, district or county labor bureau or employment training center at their place of residence or work, and then those who pass the examination can obtain a welding certificate. Welding certificate is the qualification certificate of professional and technical employment. Generally, you need to go through training and then pass the examination before you can take up your post. Those who have not been trained or failed the training examination shall not be employed. The welding certificate needs to be handled in the labor bureau, which is divided into five grades: primary, intermediate, advanced, technician and senior technician. Welder is one of the series of technical details of civil site construction. The welding machine is simple and easy to understand, not only practical, but also operable. It can be used as a blueprint for on-site preparation of welding technical disclosure, as a professional teaching material for welder induction training, technical schools, vocational schools and various short-term training classes, and is also suitable for self-study by construction workers with junior high school education or above.