China's three Shenzhou-23 astronauts – Zhu Yangzhu, Zhang Zhiyuan and Lai Ka-ying – continued scientific research, station maintenance and health monitoring nearly four months into their mission. Their work aboard China's space station includes virus-immunity research, experiment sample replacement, microbial control and medical checks. The astronauts also completed personal noise exposure dose measurements and conducted regular cleaning, inspection and maintenance of the cabin environment.