1. Municipal engineering construction general contracting second-grade to first-grade qualification upgrade

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

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

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

Fire Protection Facilities Professional Contracting Qualification Level Two

6. Municipal Public Works General Contracting Grade II

7. Waterproofing, anticorrosion, and thermal insulation professional contracting qualification level two

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

9. China Cleaning Industry Standardization Association Qualification Certificate for Personnel

10. Class II Professional Qualification for Foundation Engineering General Contracting

11. China Tendering and Bidding Website Credit Certificate Inquiry

12. Class Two Professional Qualification for Building Facade Engineering General Contracting

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

14. Construction labor is not categorized by grades.

15. Class Two Qualification for Professional Contracting in Architectural Decoration and Renovation

16. Class 2 Qualification for Specialized Contracting in Crane Equipment Installation Engineering

17. Furniture CQTA Quality Verification Certificate

18. Communication Engineering General Contracting Qualification Level II

19. Class II General Contracting Qualification for Highway Engineering Construction

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