Tiangong-3 will be a Chinese space station module, part of the Tiangong space station program. The China National Space Agency was originally expected to launch Tiangong-3 around 2015, following the launch of the Tiangong-2 laboratory module originally planned for 2013. , it is expected to launch in 2022. Tiangong-3's design will form the basis of Chinese large modular space station, which is expected to launch in the 2020s.