 Mainly engaged in the general contracting management of port and shipping engineering, maintenance engineering, highway subgrade and pavement engineering, bridge engineering and municipal public utilities engineering engineering machinery and equipment leasing, and sales of building materials. This business division is a newly expanded field of the company, mainly engaged in the design, consulting, safety assessment and other businesses of highway engineering, port and water engineering, and water conservancy engineering. Subordinate to the Tongtong Engineering Testing Company, mainly engaged in highway, water transport construction process testing, quality appraisal, material testing, traffic engineering safety, etc. |