The return capsule of the Shenzhou-15 manned spaceship touches down safely at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. (Xinhua/Lian Zhen)

Astronaut Deng Qingming is out of the return capsule of the Shenzhou-15 manned spaceship at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. The return capsule of the Shenzhou-15 manned spaceship, carrying astronauts Fei Junlong, Deng Qingming and Zhang Lu, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region safely on Sunday. (Xinhua/Li Zhipeng)

Astronaut Zhang Lu is out of the return capsule of the Shenzhou-15 manned spaceship at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. The return capsule of the Shenzhou-15 manned spaceship, carrying astronauts Fei Junlong, Deng Qingming and Zhang Lu, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region safely on Sunday. (Xinhua/Li Zhipeng)

Astronaut Zhang Lu is out of the return capsule of the Shenzhou-15 manned spaceship at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. The return capsule of the Shenzhou-15 manned spaceship, carrying astronauts Fei Junlong, Deng Qingming and Zhang Lu, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region safely on Sunday. (Xinhua/Li Zhipeng)

Astronaut Fei Junlong is out of the return capsule of the Shenzhou-15 manned spaceship at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. The return capsule of the Shenzhou-15 manned spaceship, carrying astronauts Fei Junlong, Deng Qingming and Zhang Lu, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region safely on Sunday. (Xinhua/Li Zhipeng)

Astronaut Zhang Lu is out of the return capsule of the Shenzhou-15 manned spaceship at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region, June 4, 2023. The return capsule of the Shenzhou-15 manned spaceship, carrying astronauts Fei Junlong, Deng Qingming and Zhang Lu, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region safely on Sunday. (Xinhua/Lian Zhen)

The return capsule of the Shenzhou-15 manned spaceship touches down safely at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. (Xinhua/Lian Zhen)

The return capsule of the Shenzhou-15 manned spaceship touches down safely at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. (Xinhua/Lian Zhen)

The return capsule of the Shenzhou-15 manned spaceship touches down safely at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. (Xinhua/Li Zhipeng)

Astronaut Zhang Lu is out of the return capsule of the Shenzhou-15 manned spaceship at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. The return capsule of the Shenzhou-15 manned spaceship, carrying astronauts Fei Junlong, Deng Qingming and Zhang Lu, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region safely on Sunday. (Xinhua/Lian Zhen)

Astronaut Deng Qingming is out of the return capsule of the Shenzhou-15 manned spaceship at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. The return capsule of the Shenzhou-15 manned spaceship, carrying astronauts Fei Junlong, Deng Qingming and Zhang Lu, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region safely on Sunday. (Xinhua/Lian Zhen)

Astronaut Fei Junlong is out of the return capsule of the Shenzhou-15 manned spaceship at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. The return capsule of the Shenzhou-15 manned spaceship, carrying astronauts Fei Junlong, Deng Qingming and Zhang Lu, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region safely on Sunday. (Xinhua/He Shuchen)

Astronaut Fei Junlong is seen coming out of the return capsule of the Shenzhou-15 manned spaceship at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region June 4, 2023. The return capsule of the Shenzhou-15 manned spaceship, carrying astronauts Fei Junlong, Deng Qingming and Zhang Lu, touched down at the Dongfeng landing site in north China's Inner Mongolia Autonomous Region safely on Sunday. (Xinhua/He Shuchen)