The ninth batch of space science experiment samples from the China Space Station has successfully returned aboard the Shenzhou-21 spaceship. The returned scientific experiment samples from this downmass mission cover 26 research projects, comprising nine types of life science samples, 32 varieties of material samples, and three categories of combustion experiment samples, with a total mass of approximately 46.67 kilograms. On November 15, it was learned from Southwest Jiaotong University that an experimental module featuring a novel sterilization technology, developed by a team led by Professor Zhou Zuowan and Associate Professor Xu Xiaoling from its School of Chemistry, had returned to Earth aboard the Shenzhou-21 manned spaceship's return capsule. Xu Xiaoling received the downmass samples at the landing site.

Following the samples' arrival at Southwest Jiaotong University, the research team will promptly initiate sample analysis to comprehensively evaluate their properties, including antimicrobial efficacy, microbial colonization status, and antibacterial mechanisms. This study will establish a solid data foundation for subsequent technology application and upgrading, provide a technical reference for microbial prevention and control in tasks such as long-term safe and stable operation of China's space station, and contribute to advancing China's manned spaceflight technology to a higher level.

The team led by Zhou Zuowan and Xu Xiaoling has long focused on developing antimicrobial materials for crewed spacecraft cabins. Through sustained collaboration with the China Academy of Space Technology, they have continuously participated in the research and development of antimicrobial materials and technologies from the Tiangong-1 and Tiangong-2 to the current China Space Station phase. The team's achievement of the "Development and Application Promotion of Antimicrobial Materials for Crewed Spacecraft Cabins" was awarded the first prize of the 2019 Sichuan Provincial Science and Technology Progress Award.

Furthermore, following the landing of the returned mouse experiment samples from this downmass mission, researchers immediately initiated on-site processing. By observing mouse behaviors and measuring key physiological and biochemical indicators, the researchers will preliminarily analyze the stress responses and adaptive change patterns of the mice to the space environment, thereby providing scientific evidence for further understanding the effects of space conditions on living organisms.