【#Tech24H】At 19:35 on March 16 (Beijing Time), the Shenzhou-21 crew—astronauts Zhang Lu, Wu Fei, and Zhang Hongzhang—completed their second extravehicular activity (EVA), lasting approximately seven hours. Working in close coordination with the space station's robotic arm and ground support teams, they successfully installed space debris protection devices and carried out other scheduled tasks. The trio has now spent over four months in orbit. Additional EVAs and scientific experiments are planned for the remainder of the mission.