Queqiao relay satellite, was the first of the pair of communications relay and radio astronomy satellites for the Chinese Lunar Exploration Program. The China National Space Administration (CNSA) launched the Queqiao relay satellite on 20 May 2018 to a halo orbit around the Earth–Moon L2 Lagrangian point Queqiao is the first communication relay and radio astronomy satellite at this location. The name Queqiao ("Magpie Bridge") was inspired by and came from the Chinese tale The Cowherd and the Weaver Girl. Queqiao was designed to function as a communication relay for the Chang'e 4 mission to the far side of the Moon, as well as a deep space radio astronomy observatory for the Chinese space program.

Wikipedia: https://en.wikipedia.org/wiki/Queqiao-1. Original timeline Wikipedia link: https://en.wikipedia.org/wiki/Queqiao. Related NASA reference: https://nssdc.gsfc.nasa.gov/planetary/chronology.html#2018. Description adapted from Wikipedia contributors (CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0/).