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.
Zhongxing-18 (Chinasat-18) is a Chinese communications satellite based upon a DFH-4E bus. The Chinasat-18 provides Ku commercial communications services with 30 Ku-band transponders, Ka broadband communication services with 14 Ka-band MSS spot user beams and exploring Ka-band broadcasting services with 2 Ka BSS-band transponders within the service coverage areas.