The third phase of CMS began in 2020. The goal of this phase is to build China's own space station, Tiangong. The first module of Tiangong, the Tianhe core module, was launched into orbit by China's most powerful rocket Long March 5B on 29 April 2021. It was later visited by multiple cargo and crewed spacecraft and demonstrated China's capability of sustaining Chinese astronauts' long-term stay in space.
The third phase of CMS began in 2020 The goal of this phase is .to build China's own space station, Tiangong. The first module of Tiangong, the Tianhe core module, was launched into orbit by China's most powerful rocket Long March 5B on 29 April 2021. It was later visited by multiple cargo and crewed spacecraft and demonstrated China's capability of sustaining Chinese astronauts' long-term stay in space.