As a pilot company in state-owned assets operation appointed by SASAC, SDIC plays its unique role originating from the nature of being a state investment holding company in optimizing the structure of state sector of the economy. Currently, five companies have been merged into SDIC. They are China National Investment & Guaranty Co.,Ltd., China SDIC International Trade Co.,Ltd., China Electronics Engineering Design Institute, China National Complete Plant Import & Export Corporation (Group) and China Gaoxin Investment Group Corporation. And SDIC has finished the trusteeship of China National Packaging Corporation.