Shenzhou-21 Crew Begins Extended Mission Aboard Tiangong Station
The Shenzhou-21 crew has commenced a one-month extended mission aboard China’s Tiangong space station, following the successful completion of their initial six-month stay in orbit. The three astronauts, Zhang Lu, Wu Fei, and Zhang Hongzhang, entered the station on 1 November 2025. Since then, they have operated under stable and favourable conditions, enabling them to proceed with an extended phase of their mission.
This additional month aims to further validate technologies essential for long-duration human spaceflight. Moreover, it allows the crew to refine operational procedures and gather extended data that will support future missions.
Preparations and System Checks
Firstly, the astronauts will focus on preparing for the upcoming crew handover. This process includes concluding ongoing scientific experiments and organising collected data. In addition, they will conduct comprehensive checks of payloads, cabin systems, and life support equipment. These efforts ensure that all systems remain fully operational ahead of the next crew’s arrival.
Secondly, the crew will begin packing experimental samples and essential equipment for their return to Earth. At the same time, they will transfer waste materials to the Tianzhou-9 cargo spacecraft, which will handle disposal at a later stage. This step ensures efficient station management and maintains onboard safety.
Inspections and Physical Conditioning
Thirdly, the astronauts will carry out detailed inspections of the spacecraft. They will verify the airtight integrity of hatches and examine the return module’s life support systems. Furthermore, they will assess communication equipment, portholes, and structural components. These checks are critical to identify and eliminate any potential risks, including those caused by space debris.
In addition, the crew will intensify their physical training routines. This preparation helps them readjust to Earth’s gravity upon return. Simultaneously, they will closely monitor their biological rhythms, psychological wellbeing, and interpersonal dynamics. These observations contribute valuable insights for future extended missions.
Final Procedures and Mission Milestones
Finally, the astronauts will review all return procedures in detail. This ensures that every stage of their journey back to Earth proceeds safely and efficiently.
With this extension, the Shenzhou-21 mission is expected to surpass the previous record of 204 days in orbit set by Shenzhou-20. So far, the crew has completed three spacewalks and conducted 27 scientific experiments. During the extended period, they will also prepare to receive the Tianzhou-10 cargo spacecraft and welcome the incoming Shenzhou-23 crew.
With inputs from Reuters
