The Gaofen-4 geostationary optical satellite launched in 2015 on a Long March 3B rocket and provides 50-meter-resolution images.
The Yaogan-41 mission could be a military follow-up to the civilian Gaofen-4 GEO optical satellite launched in 2015.
Gaofen-13 satellites are thought to be more capable versions of the Gaofen-4 geostationary optical satellite launched in December 2015.
Gaofen-4 was previously the only Gaofen satellite in geostationary orbit.
The Gaofen series includes Gaofen-4, a geosynchronous satellite launched in 2015.