The Earth and far side of the Moon as seen by the Chinese Longjiang-2 lunar orbiting spacecraft. MingChuan Wei, Harbin Institute of Technology.
When Earth and the moon lined up, a group of radio enthusiasts sent the command to Longjiang-2 to take the shot, downloading the image to the Dwingeloo radio observatory in the Netherlands.
On May 20, 2018, China launched Queqiao lunar communications relay satellite, a key component of the upcoming Chang’e 4 lunar landing mission. During its journey to the Moon, it dropped off a pair of student-made small satellites, Longjiang-1 and Longjiang-2, bound for lunar orbit called. Their purpose was testing out future radio astronomy and interferometry techniques.