Core Viewpoint - The Shenzhou-21 crew, consisting of astronauts Zhang Lu, Wu Fei, and Zhang Hongzhang, has been on a space mission for over three months, continuing various experiments and environmental monitoring aboard the Chinese space station [1]. Group 1: Space Science Experiments - In the field of space medicine, the crew has completed blood sample collection and processing, which will be used to study the physiological changes and adaptation mechanisms of astronauts' skeletal, neural, and cerebrovascular systems during long-duration flights [2]. - The crew is conducting experiments on the effects of microgravity on visual asymmetry and its cognitive neural mechanisms using a laptop [4]. - Ongoing experiments in the field of microgravity physical sciences are being carried out [4]. Group 2: Environmental Monitoring - The crew is monitoring the thermal environment inside the station and conducting air cleanliness tests using equipment such as dew point meters [5]. Group 3: Health Management - Health management includes the use of an adhesive device to stimulate lower limb flexor muscles during exercise in a weightless environment, fulfilling exercise requirements [6]. - The crew has completed multiple medical checks, including intraocular pressure and fundus examinations, as well as overall visual function measurements and orbital B-scan measurements [6].

Core Viewpoint - The Shenzhou 21 crew's space mission has been ongoing for over three months, with various scientific experiments and maintenance tasks being conducted systematically within the space station [1]. Group 1: Space Science Experiments - In the field of aerospace medicine, the crew has completed blood sample collection and processing, which will be used to study the physiological changes and adaptation mechanisms of astronauts' skeletal, neural, and cerebrovascular systems during long-duration flights [2]. - The crew is conducting experiments related to the impact of microgravity on visual asymmetry and its cognitive neural mechanisms using a laptop [4]. Group 2: Equipment Maintenance and Environmental Monitoring - The crew has performed various maintenance tasks, including cleaning experimental samples, maintaining electrode mechanisms, and replacing experimental samples in fluid dynamics modules [4]. - Environmental monitoring has been conducted using devices like dew point meters to assess the thermal environment inside the station, along with air cleanliness testing [6]. Group 3: Health Management - Astronauts are utilizing devices with adhesive properties to stimulate lower limb flexor muscles during exercise in a weightless environment, fulfilling their exercise requirements [8]. - Multiple medical examinations have been completed, including eye pressure checks, overall vision function measurements, and orbital B-scan measurements [8].