China's in-orbit Shenzhou-20 and Shenzhou-21 crew members held a handover ceremony on Tuesday, during which they transferred the symbolic key to the space station, according to the China Manned Space Agency.

So far, the Shenzhou-20 crew has completed all their planned tasks, and is scheduled to return to the Dongfeng landing site in north China's Inner Mongolia Autonomous Region on Wednesday.

The landing site and all relevant systems are making final preparations for their return.