Core Insights - The Shenzhou-20 crew successfully completed their third extravehicular activity, with the space station's extravehicular suit B achieving a milestone of 20 outings over 4 years, marking a significant advancement in China's space suit technology [1][2]. Group 1 - The extravehicular suit B has been used by 11 astronauts across 8 manned missions, demonstrating stable performance and supporting the operational needs of the space station [1]. - The suit has undergone significant enhancements in functionality and performance compared to the first-generation suits, focusing on longevity, safety, and operational efficiency [1]. - The extravehicular suit is the first flight product to undergo in-orbit lifespan assessment and extension, with a design life nearing its limit of 3 years and 15 outings by early 2024 [2]. Group 2 - A scientific and reasonable lifespan assessment and health monitoring plan has been developed to evaluate the remaining life of the extravehicular suit, ensuring its safe and reliable use in orbit [2]. - Two new extravehicular suits, D and E, have been successfully unpacked and tested, and will be gradually introduced in future extravehicular activities [2].

Core Points - The Shenzhou-20 crew successfully completed their third extravehicular activity, marking a significant milestone for China's space station program [1] - The space suit B has achieved a remarkable record of 20 extravehicular missions over four years, demonstrating its durability and reliability [1][10] - The space suits A and B were both launched with the Tianzhou-2 mission in 2021, with suit A having been used 18 times and suit B reaching its 20th use [12] Summary by Category Extravehicular Activities - The Shenzhou-20 mission involved astronauts Chen Dong, Liu Boming, and Tang Hongbo performing tasks outside the space station, showcasing the effectiveness of the new generation "Feitian" space suits [4][7] - The astronauts utilized a robotic arm for support during their nearly two-hour spacewalk, indicating advancements in operational capabilities [7] Space Suit Performance - Space suit B has been used by 11 astronauts across 8 manned missions, with assessments confirming its stable condition, which supports ongoing extravehicular activities [10] - The space suits are the first in-orbit products to undergo lifespan assessment and extension, highlighting advancements in space suit technology [14] Future Developments - Two new space suits D and E have been prepared for future missions, indicating ongoing improvements and readiness for upcoming extravehicular tasks [14]

Core Insights - The Shenzhou-20 crew successfully completed their third extravehicular activity (EVA) on August 15, 2025, with the space station's extravehicular suit B achieving the milestone of 20 EVAs over 4 years, marking a significant extension of its operational life [1][4][5] - The extravehicular suit has been utilized by 11 astronauts across 8 manned missions, demonstrating stable performance through dynamic assessments, thereby supporting the quality and effectiveness of space suit engineering applications [1][4] - The suit's functionality and performance have significantly improved compared to the first generation, achieving breakthroughs in longevity, safety, and operational efficiency, which are crucial for the construction and operational phases of the space station [1][4] Summary by Sections Extravehicular Suit Achievements - The space station's extravehicular suit B has completed 20 EVAs, fulfilling the "4 years and 20 times" longevity goal [1][4] - The suit has been used in 8 manned missions, with its condition assessed as stable and reliable [1][4] Technological Advancements - The suit has achieved significant enhancements in key technologies such as long life, high safety reliability, and efficient operational support compared to the first generation [1][4] - It is the first flight product to undergo in-orbit lifespan assessment and extension, ensuring its safe and reliable use in space [5] Lifespan Assessment and Future Plans - As of early 2024, the in-orbit suit is approaching the design limit of 3 years and 15 EVAs [5] - A scientific lifespan assessment and health monitoring plan has been established to evaluate the remaining lifespan of the suit [5] - Two new extravehicular suits D and E have been successfully unpacked and tested, ready for future EVA missions [2][5]