Zhejiang Chang'an Dunji New Materials Co., Ltd. is a trusted brand in China's pore grouting materials. The company has a 25-year development history and has gradually developed from a single business expansion agent to a pore grouting material product dominated by pore grouting materials, integrating pore pressure. A modern enterprise integrating slurry, pore grouting agent, high-strength non-shrinkage grouting material, cement-based permeable crystalline waterproofing material, bridge support mortar and other products.

The series of products produced by the company have passed the national ISO9001: 2008 quality management system, ISO14001: 2004 environmental management system, OHSAS18001: 2007 occupational health and safety management system certification, and in 2015 it became JT/T 946- 2014 "Standard Grouting Material (Agent) Standard for Highway Engineering" was included in the editorial unit.

Over the years, Dunjiren has adhered to the business philosophy of "serve-oriented and creating value for customers". At the same time, relying on the technical strength of scientific research institutions such as the China Institute of Building Materials Science and the unremitting efforts of its own scientific research team, the pore grouting materials produced by shield base not only comply with the "New Bridge Regulations", but also passed the European Community standards. —The anti-separation performance test of "five-meter tube" makes Shinji the first enterprise in Zhejiang Province and even the whole country to master this core technology.

Shieldji people take "standing the shield of bridges and tunnels, casting the foundation of rocks" as their corporate mission, and are committed to manufacturing safety bridges and tunnels building materials, and create a safe and harmonious living environment for the people with excellent quality.