Safety production license

Registration certificate of non-pharmaceutical precursor chemicals trading

Product quality certificate of CNPC

China petroleum health and safety environment management system certification

Quality management system certificate

Environmental management system certificate

Occupational health and safety management system certificate

Business license for hazardous chemicals

Qualification of consulting for ecological construction and environmental engineering

Grade III construction enterprise qualification certificate for professional contractor of construction electromechanical installation engineering

Petrochemical engineering construction general contractor grade III construction enterprise qualification

Municipal public engineering construction general contractor grade III construction enterprise qualification

Waterproof, anticorrosive and thermal insulation engineering professional contract grade II construction enterprise qualification

Electronic and intelligent engineering professional contracting grade II construction enterprise qualification

Environmental engineering professional contractor grade II construction enterprise qualification

Grade I certificate of operation service capability evaluation of industrial wastewater treatment and disposal facilities

Domestic sewage treatment and disposal facilities operation service ability evaluation grade I certificate

Environmental engineering (solid waste treatment and disposal engineering) special grade B engineering design qualification

Class A engineering design qualification for environmental engineering (water pollution prevention and control engineering)