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.
ZX 6D (Zhongxing 6D, ChinaSat 6D) is a Chinese communications satellite based upon a DFH-4 bus. It is similar to ZX 6C launched in 2019. The Chinasat 6D satellite provides commercial communications services with twenty-five C-band transponders and supports high-quality and reliable uplink and downlink transmissions of programs for the radio and TV stations and cable TV networks. The satellite is being manufactured by CAST and will be launched onboard a CZ-3B/G2 launch vehicle.