What is the most advanced tokamak?

Could you please elaborate on what you mean by the "most advanced tokamak"? Tokamaks are a type of nuclear fusion reactor that use magnetic fields to confine a hot, ionized gas, or plasma, in a torus shape. As technology advances, so do tokamaks, with improvements in confinement efficiency, stability, and the ability to sustain fusion reactions for longer periods of time. Without specific details or criteria, it's difficult to definitively state which tokamak is the "most advanced." However, some of the leading tokamak projects in the world include ITER, which aims to demonstrate the feasibility of fusion power, and the Chinese Fusion Engineering Test Reactor (CFETR), which is intended to be a prototype fusion power plant. It's important to note that the definition of "advanced" can vary depending on the context and the specific goals of a project.