Last month, the Institute of Plasma Physics of the Chinese Academy of Sciences completed and tested the world’s largest superconducting magnet: a 582-ton giant destined for its next experimental fusion reactor, Best (Burning plasma experimental superconducting Tokamak). The plant represents the “next step” in the national research program for the production of a commercial fusion reactor, designed to trap plasma capable of exceeding 100 million degrees Celsius. The superconducting magnetThe device just tested is a superconducting magnet with a toroidal field, a key element for the operation of tokamak-type fusion reactors. The roadmap to the commercial reactorBest is the next step in China’s commercial nuclear fusion development program. The ignition of the first plasma is now scheduled for 2033–2034, moving the actual deuterium-tritium fusion phase to the late 2030s.