As detailed by Spaceflight Insider, Queqiao is part of Chang’e 4, China’s fourth lunar mission. The two Chang'e 1 and Chang'e 2 probes orbited the moon in 2007 and 2010, and Chang'e 3 landed a rover on the moon's surface in 2013. The experimental Chang'e 5 T1 mission, launched in 2014, sent a capsule around the moon and returned to Earth. The capsule demonstrated its capability by surviving re-entry, and in 2019 Chang'e 5 will land on the lunar surface, collect rock and soil samples, then lift off and return them for scientific study.