Since the Soviet Union launched the first space station, Salyut 1, 50 years ago, humans have lived on a total of 11 such facilities in Earth orbit. After the core module reaches space, China plans at least 10 more launches of other major modules, as well as crewed and cargo missions, to complete the station’s assembly by the end of 2022. At that time the CSS will join the International Space Station (ISS) as the only fully operational space stations in orbit. The station will also reserve the space and resources for a number of international experiments. Scientists can also apply through institutional partnerships for access to resources on the space station.