(1) qualification of general construction contracting: Grade I of general contracting for mechanical and electrical engineering construction, grade I of general contracting for construction engineering, grade I of general contracting for municipal public engineering construction, grade I of general contracting for metallurgical engineering construction, grade I of general contracting for petrochemical engineering construction, grade III of general contracting for electric engineering construction and grade III of general contracting for mine engineering construction.

(2) construction professional contracting qualification: Grade I for steel structure engineering, grade I for fire protection facilities engineering, grade I for building decoration engineering, grade II for electronic and intelligent engineering, grade II for Highway Traffic Engineering (highway safety facilities sub project), grade II for Highway Traffic Engineering (Highway Electromechanical Engineering sub project), grade II for power transmission and Transformation Engineering Grade III contracting, grade III contracting for construction mechanical and electrical installation engineering, grade III contracting for urban and road lighting engineering and grade III contracting for environmental protection engineering.

(3) administrative license: boiler installation, transformation and maintenance (Level 1) license, hoisting machinery installation and maintenance (level a) license, GA1 (b) + GB1 + GB2 + GC1 + GD1 class pressure pipeline installation, transformation and maintenance license, D1, D2 class pressure vessel installation and manufacturing license, installation (repair, test) power facilities (Level 4) license, civil air defense engineering protection and ventilation construction enterprise registration license.