When Physics Yields to Engineering: EAST's Density Regime Reorders Energy Geopolitics

China's EAST tokamak has experimentally accessed a theorized 'density-free regime,' sustaining plasma at 1.3–1.65 times the Greenwald limit. This January 2026 breakthrough removes a three-decade bottleneck in fusion ignition pathways, reshaping global research hierarchies and accelerating commercial timelines by years—while intensifying magnetic supply-chain dependencies and IP fragmentation risks.