In July 2025, the railway construction equipment DGM-20H rail polishing car with core power system provided by Huashi Group successfully completed various factory tests and was officially shipped to Guangzhou Metro. As a key system supplier, Huashi Group provided high-performance traction and auxiliary power solutions for the vehicle, ensuring its stable and efficient operation.

       The vehicle adopts a dual power mode of "contact network+internal combustion generator set", equipped with the core power system provided by Huashi, and has four axis drive function, which will provide strong equipment support for the refined maintenance of Guangzhou Metro lines.

The DGM-20H rail grinding car, specially developed for Guangzhou Metro, has achieved significant improvements in power performance and operational accuracy through multiple technological innovations. Its outstanding technical features are as follows:

Ultimate size and lightweight design;
Three sets of power sources for the entire vehicle are mutually guaranteed;
The performance of the polishing car has improved significantly;
Breakthrough in precise polishing ability;
Efficient green power upgrade;
Intelligent braking reduces consumption and increases efficiency;
Improved level of intelligence.

The deployment of this vehicle will greatly improve the efficiency, accuracy, and safety of rail maintenance operations in Guangzhou Metro, and assist in the smooth and efficient operation of urban rail transit.
       In the critical stage of the DGM-20H rail polishing vehicle project, the technical team of Huashi Group is facing enormous challenges. In order to benchmark the operation and maintenance standards of Guangzhou Metro, Huashi engineers spent several days overcoming multiple difficulties such as high system integration complexity and tight debugging cycles. Through continuous efforts and technical breakthroughs, they successfully developed a highly adaptable and reliable traction and auxiliary power system solution, providing key guarantees for the smooth delivery of the project.

The successful implementation of the DGM-20H rail polishing car project fully demonstrates Huashi Group's technological leadership in the field of rail transit power systems. Through this project, Huashi not only overcame multiple key technical challenges, but also accumulated valuable experience. In the future, the group will continue to deepen technological innovation, provide better solutions for the modernization of rail transit equipment, and help the industry achieve high-quality development.