HD.HD was established on August 18, 1998, with its registered office located in Xining City, Qinghai Province. The company primarily engages in the R&D, production, and sales of machine tool products, elevator components, and lighting equipment. Its main products include CNC heavy-duty horizontal lathe series, roll lathe series, railway-specific lathe series, vertical/horizontal/gantry/five-face machining center series, scroll compressors, gears (gearboxes), precision transmission key components, and LED road/general lighting products. These products are widely applied in industries and fields including construction machinery, steel, aerospace, rail transit, military, and general lighting. Key products include: CNC heavy-duty horizontal lathe series, roll lathe series, railway-specific lathe series, vertical/horizontal/gantry/five-face machining center series, scroll compressors, gears (gearboxes), precision transmission critical components, and LED road and general lighting products.