The reporter learned from the Institute of Plasma Physics of the Chinese Academy of Sciences Hefei Institute of Material Sciences that the full superconducting magnet jointly developed by the Institute, together with the Hefei International Center for Applied Superconductivity, the Energy Research Institute of the Hefei Comprehensive National Science Center and Tsinghua University, has successfully generated a strong steady magnetic field of 351000 gauss. Magnetic fields are everywhere, and the Earth itself is a huge magnet that generates a 0.5 Gauss geomagnetic field, like an invisible giant umbrella that protects all things on Earth from the invasion of cosmic rays. Many organisms also use the geomagnetic field to distinguish directions. A fully superconducting magnet is a magnet made by winding superconducting materials, which can generate a huge magnetic field and has broad application prospects. Liu Fang, a researcher at the Institute of Plasma Physics, told reporters that they have innovated the magnet structure by coaxial nesting of high and low temperature superconducting magnets, optimizing collaborative methods and control processes, effectively solving problems such as stress concentration and shielding current effects under low temperature and high field conditions, greatly improving the mechanical stability and electromagnetic performance of the magnet under extreme working conditions. In the experiment from the night of September 26th to the early morning of September 27th, the superconducting magnet operated stably at 351000 Gauss for 30 minutes and safely demagnetized, fully verifying the reliability of the technical solution. Superconducting magnets are one of the core components of magnetic confinement fusion devices, like a "magnetic cage" that accommodates safe "combustion" of high-temperature plasma. The Institute of Plasma Physics has long been engaged in research on magnetic confinement nuclear fusion. In recent years, it has successively developed technologies such as 100kA high-temperature superconducting current leads and nanoohm level low resistance superconducting joints, achieving complete localization of superconducting magnet materials, equipment, and systems. As one of the important member units of the China Working Group of the International Thermonuclear Experimental Reactor (ITER), the institute undertakes numerous procurement packages such as superconducting conductors, calibration field coils, and magnet feeders. It is reported that the successful development of this magnet will effectively promote the commercial application of high-end scientific instruments and equipment such as nuclear magnetic resonance imaging, and also provide key technical support for the industrialization of multiple fields such as nuclear fusion magnet devices, aerospace electromagnetic propulsion, superconducting induction heating, superconducting maglev, and efficient power transmission. (New Society)