The three astronauts of the Shenzhou-21 crewed spaceflight mission have boarded the spacecraft which is scheduled to blast off from northwest China's Jiuquan Satellite Launch Center at 23:44 Friday (Beijing Time). The three crew members, including experienced mission commander Zhang Lu and his crew mates Wu Fei and Zhang Hongzhang, who are each embarking on their first spaceflight mission, climbed aboard the spaceship with the help of technicians. Following the launch, the astronauts will complete an in-orbit rotation with the outgoing Shenzhou-20 crew and stay on board the Tiangong space station for about six months. During their mission, the Shenzhou-21 crew will undertake more than two dozen space science research and technology experiments. The trio of astronauts are also notably being joined in space by a group of four mice which will be involved in a series of in-orbit scientific experiments, marking the first time China has sent rodents on a manned space mission. The crew will also perform extravehicular activities (EVAs) and cargo handling, install space debris protection devices, and deploy and recover extravehicular payloads and equipment. They will also participate in various science education and public welfare activities while in orbit. The Shenzhou-21 crew will also witness the arrival of the Tianzhou-10 cargo spacecraft and later welcome the crew of the Shenzhou-22 crewed spaceship, who will take over duties aboard the spade station. Shenzhou-21 is the 37th flight mission of China's manned space program and the sixth manned mission during the application and development stage of the Tiangong space station. Shotlist: Jiuquan Satellite Launch Center, northwest China - Oct 31, 2025: 1. Split screens showing Shenzhou-21 astronauts, engineer inside orbital capsule, interior of reentry capsule; 2. Various of astronaut Zhang Hongzhang standing up, shaking hands with crew members, waving hand, slipping into orbital capsule with technicians' help; 3. Various of Zhang Hongzhang entering reentry capsule, sitting down; 4. Various of astronaut Wu Fei standing up, saluting, waving hand, slipping into orbital capsule with technicians' help; 5. Various of Wu entering reentry capsule, sitting down; 6. Various of astronaut Zhang Lu standing up, saluting, waving hand, slipping into orbital capsule with technicians' help; 7. Various of Zhang Lu entering reentry capsule, sitting down; 8. Split screens showing door of capsule, technicians working, astronauts in reentry capsule; 9. Launch tower; 10. Various of launch tower unfolding, spacecraft complex at launch site; 11. Astronauts in reentry capsule. [Restriction - No access Chinese mainland]