1. General Contracting Class 2 to Class 1 Qualification for Municipal Engineering Construction

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

3. Class Two Qualification for Electronic and Intelligent Engineering Professional Contracting

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

5. Class Two Fire Protection Facilities Professional Contracting Qualification

6. Municipal Public Works General Contracting, Second Grade

7. Waterproofing, anti-corrosion, and thermal insulation professional contracting qualification Level 2

8. General Contracting Qualification for Civil Engineering Construction, Second Grade

9. China Cleaning Industry Standardization Association Personnel Certificate

10. Class Two Qualification for Professional Contracting of Foundation Engineering

11. China Tendering and Bidding Website Credit Certificate Inquiry

12. Class Two Professional Contracting Qualification for Building Facade Engineering

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

14. Construction labor is not categorized by grades.

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

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

17. Furniture CQTA Quality Verification Certificate

18. General Contracting Qualification Level II for Telecommunications Engineering Construction

19. Highway Construction General Contracting Qualification Level Two

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