CRCC High-Tech Equipment Corporation Limited, together with its subsidiaries, researches, develops, manufactures, and sells large railway track maintenance machines in Mainland China and internationally. Its products include ballast maintenance and cleaning, rail profiling, comprehensive inspection, overhead catenary system, slab track maintenance, line overhaul, OCS maintenance, measuring, small track maintenance, and rail welding and track component replacement equipment. The company also manufactures, purchases, and sells parts and components such as bogies, electrical control systems, working devices, wheelsets, transmissions, pumps, valves, motors, and drive shafts, and provides overhaul services for large railway track maintenance machinery, including repair, upgrade, and remanufacture, as well as railway line maintenance services for new and existing lines. Formerly known as Kunming China Railway Large Maintenance Machinery Group Co., Ltd., it changed its name to CRCC High-Tech Equipment Corporation Limited in June 2015; it was founded in 1954 and is headquartered in Kunming, China, and is a subsidiary of China Railway Construction Corporation Limited.