- Family: Long March 3
- Length: 54.8 m
- Diameter: 3.35 m
- Launch Mass: 426 T
- Low Earth Orbit Capacity: 11500 kg
The Long March 3B was manufactured by China Aerospace Science and Technology Corporation with the first launch on 1996-02-14. Long March 3B has 21 successful launches and 3 failed launches with a total of 24 launches. The Long March 3B is a Chinese orbital carrier rocket. Introduced in 1996, it is launched from Launch Area 2 and 3 at the Xichang Satellite Launch Center in Sichuan. A three-stage rocket with four strap-on liquid rocket boosters, it is currently the most powerful member of the Long March rocket family and the heaviest of the Long March 3 rocket family, and is mainly used to place communications satellites into geosynchronous orbits.