What does it mean that the construction labor qualification is not graded? How long will the labor qualification be issued?

Project | the construction of stay cables of Peisen Liujiang super large bridge raises a “red giant umbrella”

Notice on the closed construction of Quanshui road reconstruction in urban area

Construction and installation methods of cork floor and precautions for cork floor installation

Construction of roof waterproof and leakage repair in Guangzhou

What is the construction safety check? This is the “10 checks”!

The state ordered: advance construction is prohibited, and the project payment shall not exceed 60 days! Overdue payment of 1.5 times

Please don’t laugh, we are serious about the construction according to the drawing!