Shenzhen Hengzhiyuan Electric Appliance Co., Ltd. is specialized in R & D of cold-light-source lighting instruments (semiconductor illumination) and other electric appliances for railway use, and owns many patented technologies. The Company follows Human-oriented, Service and Rationalization, and was issued with ISO9001 and ISO2000, our products issued with CCC in 2003, CRCC authentication for railway-use products in 2004, and is the special cold-light-source   lighting instruments maker engaged by Ministry of Railways, and participates in the preparation of the standards for railway interests.     The ready-developed cold light source series products include reading light, floor light and floor light for store use, step light, spotlight, down light, signal lamp and ultra bright torch; minitype electric appliance series products: electric appliance cabinet lock, lavatory display, photoelectric switch, electronic ballast, inverter, intellectualised lighting control system, monitored control System, on-car LCD and auxiliary information network products, etc., many of which have been widely used in 25 series top cars, mini-train, subway train and military vehicles, and many which are well sold in overseas market.