Tieliu Co., Ltd. manufactures and sells automotive transmission systems and high-precision components in China and internationally. It operates through four segments: core robot component manufacturing, automotive transmission system manufacturing, high-precision component manufacturing, and intelligent commercial vehicle services. Its products include clutch kits, hydraulic converters, self-adjusting clutches, concentric slave cylinders, dual-mass flywheels, wind power yaw brakes, torsion-limited dampers, release bearings, brake pads, AMT heavy truck special kits, commercial vehicle clutches, mining vehicle sheet metal, dry DCT dual clutches, wet double clutches, and double-plate oblique spiral spring clutches under the TIELIU, WESTLAKE, DELSAH, CITIAN, and ZDL brands, as well as automotive smart services and components such as hydrogen pumps, vacuum shafts, injector bodies, radiators, e-brake shafts, pump flanges, sleeves, function structure parts, and ECS body structure parts. The company was formerly known as Zhejiang Tieliu Clutch Co., Ltd. and changed its name to Tieliu Co., Ltd. in September 2023. Founded in 2009, it is headquartered in Hangzhou, China.