Core Viewpoint - The Shenzhou 21 crew is actively engaged in various scientific experiments and training in space as they approach the Lunar New Year, showcasing the ongoing advancements in space research and technology [1][17]. Group 1: In-Orbit Training and Experiments - The crew is conducting in-orbit training alongside microgravity intuitive physics behavior experiments, utilizing a metacognitive training system for image recognition and operational testing under different initial conditions [2] - The astronauts are using laptops to carry out microgravity intuitive physics behavior experiments, collecting data to explore the effects of long-term spaceflight on intuitive physical representation and recovery mechanisms [4] - The crew is involved in human-robot collaboration experiments with the robot "Xiaohang," focusing on human-robot spatial relationships and multimodal interaction technologies [6] Group 2: Physical and Biological Research - Astronauts are conducting research on muscle and joint stress during exercise, collecting data on foot pressure, joint kinematics, and muscle parameters to understand the relationship between different exercise states and foot pressure [8] - The crew is wearing bionic adhesive shoes to complete lower limb force stimulation tests, gathering data to explore muscle function maintenance and the relationship between stimulation patterns and data [10] - Ongoing brain electrical testing projects are being conducted, utilizing near-infrared brain function imaging to study the impact of long-term spaceflight on astronauts' brain networks and their adaptive mechanisms to external environmental changes [12] Group 3: Equipment Maintenance and Management - The crew has completed maintenance checks on the regenerative life support system and cabin environment, as well as replaced foot limiters to help stabilize body posture in microgravity [15] - Various tasks related to fluid physics and combustion experiments have been performed, including sample changes and equipment maintenance [14]

Group 1 - The core crew of Shenzhou 21 is actively engaged in various tasks in space, including training and scientific experiments as they approach the Lunar New Year [1][16] - The crew is conducting in-orbit training and experiments related to microgravity intuitive physical behavior, utilizing a metacognitive training system for image recognition and operational testing [3][5] - Research on the effects of long-term space flight on intuitive physical representation and recovery mechanisms is being carried out through data collection during microgravity experiments [5][10] Group 2 - The crew is involved in studying the impact of different load conditions on foot pressure and joint kinematics during exercise, using various equipment to gather data on muscle-tendon interactions [7][11] - Human-robot collaboration experiments are being conducted with the robot "Xiaohang," focusing on human-machine spatial relationships and multimodal interaction technologies [8] - Maintenance and management tasks are being performed, including checks on life support systems and cabin environment cleanliness, as well as replacing foot limiters to aid astronauts in stabilizing their posture in microgravity [14]

Core Insights - The Shenzhou 21 crew, consisting of astronauts Zhang Lu, Wu Fei, and Zhang Hongzhang, has been in orbit for three months, conducting various planned experiments and maintenance tasks in the Chinese space station [1] Group 1: In-Orbit Experiments - In the field of aerospace medicine, pharmacokinetics projects are ongoing, with saliva samples collected by astronauts to assist researchers in future in-orbit medication guidance [3] - The astronauts utilized laptops and related experimental software to complete tests on human-machine trust, exploratory utilization research, metacognitive monitoring, in-orbit emotional state testing, and emergency decision-making capability assessments [5] - Lower limb force stimulation tests were conducted as planned, with astronauts wearing bionic adhesive shoes to exercise and stimulate lower limb flexor muscles in a microgravity environment [5] Group 2: Microgravity Physical Science Experiments - The crew conducted planned experiments in microgravity physical science, including sample replacement in fluid physics experiment cabinets and maintenance of axial mechanism electrodes and window cover lenses [7] Group 3: Environmental Monitoring and Management - The crew completed multiple tasks related to environmental monitoring and station management, including wind speed and temperature measurements, personal noise exposure assessments, and cabin environment organization [11] Group 4: Health Maintenance - The astronauts performed various medical checks, including dynamic electrocardiogram and blood pressure monitoring, non-invasive cardiac function assessments, abdominal, vascular, and muscle ultrasounds, bone density measurements, and hearing tests to closely monitor their health status in orbit [14] - In-orbit exercise activities were actively conducted to counteract the physiological effects of microgravity [14]