The Iridium-MFS payloads were mass models of the Iridium communications satellites. Two were launched to test the new CZ-2C (2) SD launch vehicle and the payload dispenser.
The Long March 2C is a family of expendable launch vehicles made and operated by China. It is a two stage launch vehicle with storable propellants, consisting of Nitrogen Tetroxide and Unsymmetrical Dimethylhydrazine. The 2C/SD variant has an additional "Smart Dispenser" upper stage for multiple payloads.
The China Aerospace Science and Technology Corporation (CASC) is the main contractor for the Chinese space program. It is state-owned and has a number of subordinate entities which design, develop and manufacture a range of spacecraft, launch vehicles, strategic and tactical missile systems, and ground equipment. It was officially established in July 1999 as part of a Chinese government reform drive, having previously been one part of the former China Aerospace Corporation. Various incarnations of the program date back to 1956.INFO WIKI