After consulting by the Skills Section of the Vocational and Technical Training Center of the Labor Bureau, the welder's work license is reviewed once every two years, and it needs to be renewed after two reviews. Please bring the certificate of junior high school education or above, a copy of your ID card, a copy of the original welder's employment certificate, and a 1 2 inch blue background photo to the Skills Section of the Vocational and Technical Training Center of the Municipal Labor and Social Security Bureau for replacement.