Chang'e 4 is a Chinese lunar exploration mission that will incorporate an orbiter, a robotic lander and rover. The orbiter serves as a communications relay satellite. It will be placed into a halo orbit around the Earth-Moon L2 Lagrange point and is planned to support further missions to the far side of the Moon.
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.
The Chinese Lunar Exploration Program also known as the Chang'e Project after the Chinese moon goddess Chang'e, is an ongoing series of robotic Moon missions by the China National Space Administration (CNSA). The program incorporates lunar orbiters, landers, rovers and sample return spacecraft, launched using Long March rockets.