The welder's climbing license belongs to the special operation license and needs to be registered (organized) in the labor bureau or a qualified training institution. After passing the training and examination, the safety production supervision and management bureau will issue a certificate.

Welder is a type of work that uses proper welding method, reasonable welding technology, suitable welding equipment, filler made of the same material or different materials as the base metal, or even does not use filler, and closely connects metal or nonmetal workpieces by heating or pressurizing or both.