The staff upgraded and reconstructed the fully superconducting Tokamak nuclear fusion experimental device (EAST). The reporter learned from the Institute of Plasma Physics, Hefei Institute of Material Sciences, Chinese Academy of Sciences that recently, the nuclear fusion scientific team of the Institute has discovered and proved a new high-energy beam confinement mode, SuperI-mode, using the "artificial sun" called the fully superconducting Tokamak large scientific device (EAST), which is of great significance to the operation of the international thermonuclear fusion experimental reactor and the future fusion reactor. On January 7, the international academic journal Science Progress published the research results. At present, there are three main ways to realize nuclear fusion reaction: gravitational constraint, magnetic constraint and laser inertial constraint. Due to its large mass, the sun can undergo gravitationally constrained nuclear fusion reaction under extreme high temperature and high pressure through huge gravity. On the earth, there are two main ways to realize controllable nuclear fusion: magnetic confinement fusion and laser inertial confinement fusion. Laser inertial confinement fusion uses laser as the driver to compress the deuterium and tritium fuel pellet and realize the ignition and combustion of nuclear fusion within the inertial confinement time of high-density fuel plasma. The method of using strong magnetic field to constrain plasma to control the nuclear fusion reaction material in the "magnetic cage" is magnetic confinement nuclear fusion. Since the 1960s, hundreds of Tokamak devices have been built around the world. Tokamak devices built with different fusion methods have different plasma operation modes. Different Tokamak devices have different dimensions, performance and energy constraint modes. Among them, the magnetic confinement type of Tokamak is currently the most invested in research and development in the world, the closest to the ignition conditions of nuclear fusion, and the most mature way of technological development. In recent years, China's "artificial sun" EAST device experiment has made breakthroughs. It has successively operated 1 megaampere plasma current in 2010, achieved 100 million degrees Celsius high temperature plasma operation for the first time in 2018, achieved repeatable 120 million degrees Celsius 101 seconds and 160 million degrees Celsius 20 seconds of ionized operation on May 28, 2021, and achieved 1056 seconds of long pulse high parameter plasma operation on December 30, 2021. Super I mode is a new exploration, discovery and verification of plasma operation mode in Tokamak. It is understood that this advanced mode has greatly improved the efficiency of energy constraint, has the advantages of no impurity accumulation in the core, convenient discharge of fusion reaction products, and maintaining a stable temperature base, and realizes the compatibility of high constraint in the core and boundary instability, ensuring the operation of high-performance plasma in a long time scale. This high energy constraint mode, which does not require external control to ensure the stable operation of plasma, is of great significance for the future operation of fusion reactors. "If the nuclear fusion reaction is likened to a flash of lightning, then our main purpose is to collect the flash of lightning in a 'magnetic cage', gather higher energy, and then steadily export these energy for a long time for human use." said Song Yuntao, vice president of the Hefei Institute of Material Sciences and director of the Institute of Plasma Physics of the Chinese Academy of Sciences. "The newly discovered constraint