Long March 4B rocket: launch schedule, specs and record

The Long March 4B has 1 launch in T-ZERO’s current data: 0 upcoming (0 with a confirmed date) and 1 recent. Rocket family: Long March. None of them has a confirmed date yet.

Launched by: China Aerospace Science and Technology Corporation.

Flights completed so far in the data: 1 (successful). The dated launch in the data is on Oct 23, 2026. Flown by China Aerospace Science and Technology Corporation (1). Common mission types: Government/Top Secret (1). Common target orbits: Low Earth Orbit (1). Pads used: Launch Area 94 (SLS-2 / 603) (1). Counts cover roughly the last two months plus everything scheduled ahead, not the rocket’s full history.

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About the Long March 4B

The Long March 4B is a three-stage rocket built by China Aerospace Science and Technology Corporation. It stands 44.1 m (145 ft) tall and can lift 4,200 kg to low Earth orbit. Launch Library 2 counts 59 launches since its first flight on May 10, 1999, 58 successful and 1 failed.

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.

More about the Long March 4B: Wikipedia

Long March 4B specifications

Family

Long March

Variant

B

Manufacturer

China Aerospace Science and Technology Corporation

Stages

3

Height

44.1 m (145 ft)

Diameter

3.35 m (11 ft)

Liftoff mass

249 t (about 549,000 lb)

Liftoff thrust

2,961 kN (about 666,000 lbf)

Payload to LEO

4,200 kg (9,260 lb)

Payload to GTO

1,500 kg (3,310 lb)

Reusable

No

Status

Active

First flight

May 10, 1999

Long March 4B launch record (all time)

Total launches

59

Successful

58

Failed

1

Success rate

98.3% (successes out of successes + failures)

Current success streak

39

How the Long March 4B compares

By payload to low Earth orbit (4,200 kg) it ranks 22nd of the 37 rockets on T-ZERO with a listed value; the largest is the Starship V3 at 100,000 kg. By height (44.1 m) it ranks 26th of the 40 rockets on T-ZERO with a listed value; the largest is the Starship V3 at 124.4 m. By liftoff thrust (2,961 kN) it ranks 25th of the 36 rockets on T-ZERO with a listed value; the largest is the Starship V3 at 80,807 kN.

Other Long March-family rockets on T-ZERO: Long March 10A, Long March 12, Long March 12A, Long March 2C, Long March 2D, Long March 2F/G, Long March 6A, Long March 8A.

Where the Long March 4B launches from

• Jiuquan Satellite Launch Center, People's Republic of China: 1 recent · pads: Launch Area 94 (SLS-2 / 603) (1) · Where to watch launches here

Counts are launches in T-ZERO’s current data (upcoming plus roughly the last two months).

Upcoming launches (0)

No upcoming launches listed right now.

Recent launches (1)

1. Photo: LL2

   Long March 4B | Yaogan 53-07 to 09/56-19 to 21

   Success

   Oct 23, 2026, 2:25 PM CDT

   Long March 4B · China Aerospace Science and Technology Corporation · Launch Area 94 (SLS-2 / 603), Jiuquan Satellite Launch Center, People's Republic of China