Core Points - The Shenzhou 20 crew has been in orbit for two months since April 25, successfully adapting to the microgravity environment and completing multiple space science experiments and tasks [1][5][7] - The crew conducted the first-ever space regeneration experiment on planarians, exploring the effects of microgravity and radiation on their regeneration mechanisms [5] - The Shenzhou 20 crew performed their first extravehicular activity, installing a space debris protection device and conducting inspections of external equipment [5][7] Group 1 - The Shenzhou 20 crew, consisting of Chen Dong, Chen Zhongrui, and Wang Jie, met with the Shenzhou 19 crew in space, marking the sixth "space rendezvous" in China's space history [3] - The two crews completed an in-orbit handover on April 27, continuing their collaborative efforts in the Chinese space station [3] - The Shenzhou 20 crew is currently in good condition, and their various space science experiments are progressing steadily [7] Group 2 - The crew has been involved in multiple projects, including studies on trust and collaboration mechanisms, visual motion gravity characterization, and microgravity relationship cognition [7] - They utilized ultrasound diagnostics to examine blood vessels and conducted various tests related to memory, strength, and heavy object handling [7] - Research on the effects of microgravity on microorganisms, specifically Streptomyces, was also conducted, focusing on growth, differentiation, and biological activity [7]

Group 1 - The core viewpoint of the articles highlights the introduction of planarians, a flatworm with remarkable regenerative abilities, into the Chinese space station for scientific experiments [1] - Planarians have been used in biological research for over 520 million years and can regenerate various body parts, including muscles, skin, intestines, and even the brain, which is significant for understanding aging and regeneration mechanisms [1] - The Chinese space station will utilize a "small universal biological culture module" within the "life ecology experiment cabinet" to study the effects of the space environment on planarian regeneration and physiological behavior [1] Group 2 - Previous experiments in the Chinese space station involved zebrafish and fruit flies, which are important model organisms for life sciences research due to their genetic similarities to humans and established research history [2] - Zebrafish, with over 70% genetic similarity to humans, were sent to the space station in April 2024 to study the impact of microgravity on vertebrate muscle and bone proteins [2] - Fruit flies, used for over a century in research, were sent in November 2024 to investigate their growth, movement characteristics, and biological rhythms under microgravity and low magnetic environments, providing insights for future human exploration of the Moon and Mars [2]