Steel Structure certificate: A-level qualification as light steel structure project designer A-level Construction Industry (Construction Engineering) CERTIFICATE A-level qualification as general contractor of mechanical & electrical installation project A-levelqualificationasspecializedcontractorofsteelstructureproject C-level qualification as general contractor of construction project C-level qualification as general contractor of electric power project C-level qualification as general contractor of petrochemical project C-level qualification as general contractor of municipal utilities project environmental management system certificate of conformity Special Equipment Manufacturing License Special Equipment Installation, Transformation and Maintenance Permit occupational health and safety management system certificate of conformity quality management system certificate of conformity First-level Construction Engineering General Contracting First-level general contracting for mechanical and electrical engineering construction First-level Professional Contractor for Steel Structure Engineering