1. Municipal engineering construction general contracting level two upgrade to level one qualification

2. General Contracting Grade II to Grade I Qualification for Construction Engineering Projects

3. Class 2 qualification for electronic and intelligent engineering professional contracting

4. Class Two General Contracting Qualification for Electric Power Engineering Construction

5. Class 2 Fire Protection Facilities Professional Contracting Qualification

6. Municipal Public Works General Contracting Grade II

7. Waterproofing, anticorrosion, and thermal insulation professional contracting qualification Level II

8. General Contracting Qualification for Construction of Civil Engineering Projects - Level II

9. China Cleaning Industry Standardization Association Certification Personnel Certificate

10. Class Two Professional Qualification for Foundation Engineering General Contracting

11. China Tendering and Bidding Website Credit Certificate Inquiry

12. Class Two Professional Qualification for Architectural Façade Engineering General Contracting

13. Class II General Contracting Qualification for Water Conservancy and Hydropower Engineering Construction

14. Construction labor services are not classified by grades.

15. Class Two Qualification for Professional Contracting in Building Decoration and Decoration Engineering

16. Class Two Professional Qualification for Crane Equipment Installation Engineering General Contracting

17. Furniture CQTA Quality Verification Certificate

18. General Contracting Qualification for Grade II in Telecommunication Engineering Construction

19. Highway Engineering General Contracting Qualification Level Two

20. Class Two General Contracting Qualification for Mechanical and Electrical Engineering Construction