Core Viewpoint - The Tianzhou-9 cargo spacecraft is set to deliver two new sets of extravehicular space suits, with an extended design life from 3 years and 15 uses to 4 years and 20 uses, reflecting advancements in safety and efficiency in China's space program [1][3]. Group 1: Space Suit Design and Functionality - The extravehicular space suit is a critical piece of equipment for astronauts during spacewalks, ensuring their safety and operational efficiency [3]. - The second-generation "Feitian" space suit has seen comprehensive improvements in lifespan, safety reliability, operational efficiency, and maintenance testing capabilities [5]. Group 2: Lifespan Extension and Cost Efficiency - The extension of the space suit's lifespan aims to maximize its operational effectiveness in orbit while reducing engineering costs [7]. - The research team is tasked with conducting lifespan assessments and developing a health monitoring and lifespan evaluation system for the space suits, identifying weaknesses to facilitate future upgrades [7].