Core plot description: Inside the rotating module of the Tiangong-7 space station, floating ice crystals refracted fragmented light beneath the spotlights. Su Yingxue released the fasteners on her magnetic boots. `Her body leaned lightly backward, and the tip of her foot tapped the cabin wall where the rink barrier should have been. She stretched out her limbs and began to spin to the simulated strains of “Clair de Lune.” In zero gravity, every movement became slow and eternal, while the sensation of ice blades cutting across the rink existed only in her memory. In front of the monitoring screens, Safety Officer Lu Chenzhou furrowed his brow more and more deeply. He brought up the system alert log from three hours earlier, his finger hovering over the red button for unauthorized operations. Outside the cabin, a fragment left behind by a satellite explosion ten years ago was silently approaching the orbital intersection at eight kilometers per second.