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Zi Yuan-2 02 xing

Long March 4B

China Aerospace Science and Technology Corporation

Launch Status


Zi Yuan-2 02 xing

Type: Earth Science

JB-3 2 was nominally a Chinese (PRC) remote sensing satellite, although US intelligence sources indicated it had primarily an intelligence imaging mission. JB-3 2 was the name adopted by the USSPACECOM. Most news reports from China and elsewhere use different names: ZY-2B (acronym for ZiYuan-2B, translated as Resource-2B), and Zhong Guo Zi Yuan Er Hao, translated as China Resource 2. No information was available on the instruments onboard the JB-3 2, but officially it was intended ‘for territorial survey, environment monitoring and protection, urban planning, crop yield assessment, disaster monitoring, and space scientific experiments’.


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Launch Complex 7

Taiyuan, People’s Republic of China

121 rockets have launched from Taiyuan, People’s Republic of China.

Launch Complex 7, Taiyuan, People's Republic of China


Long March 4B – China Aerospace Science and Technology Corporation

  • 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 48 successful launches and 1 failed launches with a total of 49 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.


China Aerospace Science and Technology Corporation – CASC

  • Type: Government
  • Abbreviation: CASC
  • Administration: Chairman & President: Lei Fanpei
  • Founded: 1999
  • Launchers: Long March
  • Country: CHN

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.

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