- Family: Long March 4
- Length: 44.1 m
- Diameter: 3.35 m
- Launch Mass: 249 T
- Low Earth Orbit Capacity: 4200 kg
The Long March 4B was manufactured by China Aerospace Science and Technology Corporation with the first launch on 1999-05-10. Long March 4B has 47 successful launches and 1 failed launches with a total of 48 launches. The Long March 4B (Chinese: 长征四号乙火箭), also known as the Chang Zheng 4B, CZ-4B and LM-4B is a Chinese orbital carrier rocket. Launched from Launch Complex 1 at the Taiyuan Satellite Launch Center, it is a 3-stage rocket, used mostly to place satellites into low Earth and sun synchronous orbits.
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. China Aerospace Science and Technology Corporation is a Government CHN entity that was founded in 1999 and is administered by Chairman & President: Lei Fanpei.
China Aerospace Science and Technology Corporation has 404 successful launches and 13 failed launches with a total of 417 launches.