China has successfully tested the world’s largest superconducting magnet, a critical component for its CRAFT nuclear fusion reactor project—often referred to as an “artificial sun.” The magnet, developed by the Institute of Plasma Physics, Chinese Academy of Sciences, exceeded existing international performance standards. It consists of two key parts: a toroidal-field magnet for plasma containment and a central solenoid for ignition. This achievement represents a significant engineering advancement in the pursuit of controlled nuclear fusion. The CRAFT project aims to replicate the energy-generating process of the sun, offering a potential source of clean and sustainable energy. Passing these tests clears a major obstacle in confining plasma and achieving sustained fusion reactions. The development positions China as a leader in fusion energy research.