Core Points - The Shenzhou-20 astronaut team successfully completed their second extravehicular activity (EVA) lasting approximately 6.5 hours [1][9] - The installation of an automatic foot limit adapter and interface connector was a key task, which is expected to reduce future EVA times by about 40 minutes [5][7] - The team also installed a space debris protection device and conducted inspections of external equipment during the EVA [9][16] Group 1 - The Shenzhou-20 mission has been ongoing for over two months, focusing on various space science experiments [13] - The space debris issue has become increasingly prominent due to the rise in human space activities, posing risks to the space station [14][16] - The Chinese space station has improved its collision warning and avoidance processes to enhance its ability to prevent collisions [16][18] Group 2 - The Shenzhou-20 mission has completed a total of seven installations of space debris protection devices, providing reinforcement for critical components of the space station [16] - The research team has developed a monitoring and positioning system for potential leaks due to impacts, increasing the astronauts' response time to emergencies [18] - International cooperation has been established to share information and maintain the safety of spacecraft in orbit [18]