Melting welding and thermal cutting operations (electric welding, gas welding, arc welding, electric welding gas cutting, other), also known as the certificate of attendance, the issuing body ---- Safety Production Supervision Administration, the necessary certificates of attendance, no certificate will not work, divided into melting welding and thermal cutting operations, pressure welding operations, brazing operations, certificates With a magnetic card, the whole country. Also known as the vocational qualification certificate, the issuing body - the Labor Bureau, is the promotion, salary increase, title with the review of the necessary certificates, senior than the junior high wage 200-500, sub-craftsmen and technicians, **** 5 levels, the certificate is common throughout the country. Welder special induction operation certificate issued by the Safety Supervision Bureau, where issued can be universal, formerly known as IC card, now called the induction card, 3-year annual review, and ID cards, as long as you have a special card reader, you will be able to read out the information inside the card, but the card reader state only to qualified units, such as schools, the Safety Supervision Bureau and so on only have this certificate, no matter where you take it, as long as there is a card reader place can read cards and annual review, query. You can read the card with the annual review, the query can also be issued on the license department of the Safety Supervision Bureau's website, on the input card number query.