Shiyan 28 B-01

Launched the classified Shiyan-28B 01 experimental satellite, developed by the Chinese Academy of Sciences for space environment detection and technology tests, from Xichang; US tracking catalogued it only six days later in an unusually low-inclination orbit.

Outcome

Success

Orbit

LEO

Low Earth orbit

Payload to orbit

5.5 T (est.)

Flight

57th

of 60 Long March 4C flights

Date and time

3 July 2025, 09:35 UTC

Rocket

Long March 4C

Builder

CASC

Launch site

Launch Complex 3 (LC-3/LA-1), Xichang Satellite Launch Center, People's Republic of China

Payload

Government/Top Secret

International designator

2025-145

Launches in 2025

151st of 329

See it in orbit

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