CRRC QingDao SiFang Rolling Stock Research Institute Co,.Ltd(hereinafter refferred to as SRI),which is affiliated with CRRC Corporation Limited,lays emphasis on the development of core industries of electrical products, anti-vibration, coupler, braking and new industrial business&engineering equipment ,together with basic technology research and relevant technical support etc.and the products entered into the markets of EMU,urban rail transit,application and maintenance equipment for railway vehicles,automotive and engineering anti-vibration etc.