HD.HD was established in August 1998 and is registered in Xining City, Qinghai Province. The company primarily engages in the research, development, production, and sales of machine tool products, elevator components, and lighting equipment. Its core product portfolio includes CNC heavy-duty horizontal lathes, roll lathes, railway-specific lathes, vertical/horizontal/gantry/ five-face machining centers, as well as scroll compressors, gearboxes, precision transmission components, and LED road and general lighting products. These products are widely applied across multiple industries and sectors including construction machinery, steel, aerospace, rail transit, defense, and general lighting, committed to providing critical equipment and components for industrial manufacturing.