China's Shenzhou-21 astronauts meet Shenzhou-20 crew

The three astronauts aboard China's Shenzhou-21 spaceship have entered the country's space station and met with another astronaut trio, starting a new round of in-orbit crew handover.

The Shenzhou-21 spaceship docked successfully at the Tiangong space station, on early Saturday morning, China's state news agency Xinhua reported. The Tiangong space station exchange crews every six months. China has plans to send a crewed mission to the Moon by the end of the decade and eventually to build a base on the lunar surface.