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

2. General Contracting for Construction of Grade II to Grade I Qualification

3. Electronic & Intelligent Engineering Professional Contracting Qualification Level II

4. Class 2 General Contracting Qualification for Electric Power Engineering Construction

Fire Protection Facilities Professional Contracting Qualification Level II

6. General Contracting for Municipal Public Works Construction, Second Grade

7. Waterproofing, Corrosion Prevention, and Insulation Professional Contracting Qualification Level II

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

9. China Clean Industry Standardization Association Certification Personnel Certificate

10. Class 2 Professional Qualification for Foundation Engineering General Contracting

11. China Tendering and Bidding Website Credit Certificate Inquiry

12. Class Two Qualification for Professional Contracting of Architectural Façade Systems

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

14. Construction labor is not classified by grades.

15. Class 2 Qualification for Professional Contracting of Building Decoration and Decoration Engineering

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

17. Furniture CQTA Quality Verification Certificate

18. Class Two General Contracting Qualification for Telecommunication Engineering Construction

19. Class 2 General Contracting Qualification for Highway Engineering Construction

20. Class 2 General Contracting Qualification for Mechanical and Electrical Engineering Construction