The Chinese Space Station (CSS) is a space station being built by China in Low Earth orbit. It will be made up of several modules (parts) that need to be put together in space. The first module is called Tianhe. It was launched on 28 April 2021. It will take about 11 total launches to build the station. It is the third station by China, after Tiangong-1 and Tiangong-2.