China has marked a major moment in space history

Launching a spacecraft carrying three astronauts, the mission is now on to complete the country’s space station by the end of next year.

It will be the longest stay in low Earth orbit by any Chinese national.

As part of its plans to have a fully crewed space station by December 2022, China successfully launched the first core module earlier this year.

There is no official announcement yet on when the other sections of the space station will launch, but the module is expected to operate for at least 10 years.

Chinese astronauts have long been excluded from the international space station, due to US political objections and legal restrictions.

The three-month stay for the three men will be the longest for any Chinese astronauts, and one focus will be seeing how they handle their relatively long time in orbit.

During their sojourn on the cylinder-like Tianhe, slightly bigger than a bus, the three men will test the module’s technologies, including its life-support system.

The Tianhe, which means “Harmony of the Heavens”, is a cylinder 16.6 metres long and 4.2 metres in diameter.

The men will also be monitored for how they fare in space physically and psychologically for an extended period of time.