The issuing authority of senior welder's certificate is the Labor Bureau, which is the necessary certificate for promotion, salary increase and professional title qualification. The salary of senior welders is higher than that of junior high school. Technicians and senior technicians want to continue their studies in the future, and they also need advanced certificates for a certain number of years. Welder's grade certificate is a necessary certificate for taking up the post. Without certificates, they will not be able to work, which can be divided into fusion welding and hot cutting operations, pressure welding operations and brazing operations. The certificate is a magnetic card, which is used all over the country.