According to the 2019 Guangzhou skills household types, Guangzhou skills household package of certificates include: including welders (including electric welders, gas welders, chemical maintenance welders), rail train drivers (including rolling stock drivers, electric locomotive drivers, internal combustion locomotive drivers, urban rail train drivers), boiler equipment maintenance workers, substation equipment maintenance workers, construction machinery maintenance workers, lifting and loading machinery operators (including overhead crane workers), water production treatment workers, industrial wastewater treatment workers, industrial waste management workers, liquid crystal display device manufacturers, semiconductor chip manufacturers (including crane operator, electric loading and unloading machinery driver, internal combustion loading and unloading machinery driver), water production and treatment workers, industrial wastewater treatment workers, industrial waste gas treatment workers, liquid crystal display device manufacturers, semiconductor chip manufacturers, semiconductor discrete devices and integrated circuits assembly and adjustment workers, transformer and mutual inductor manufacturers, high and low-voltage electrical appliances and complete sets of equipment assemblers, mold workers, foundry workers, forging workers, metal heat treatment workers (including heat treatment workers), lathe operator (including CNC lathe operator), turner (including CNC turner), milling (including CNC milling, CNC milling machine operator), pliers (including assembly pliers, tool pliers, machine repair pliers, preparation of pharmaceutical production workshop maintenance, electric loading and unloading machinery repair, internal combustion loading and unloading machinery repair, chemical maintenance pliers), millwright, stamping (including cold sheet metal, cold work, sheet metal workers, ship, chemical maintenance riveters), electric cutting, traditional Chinese medicine concoctions, refrigeration Worker, manual carpentry (including fine carpentry), industrial solid waste treatment and disposal workers, airport operation conductor.