China's National Supercomputer Center reclaimed the #1 slot on the Top500 list as its new machine, Line Shine, logged 2.198 exaflops of sustained double‑precision performance. The CPU‑only system outpaced the U.S. El Capitan at Lawrence Livermore, which peaked at 1.809 exaflops, ending a nine‑year gap since a Chinese leader last topped the chart.

The machine relies on a bespoke 304-core processor array, aggregating 13.79 million cores running at 1.55 GHz and tied together with a proprietary interconnect. Drawing roughly 42.2 megawatts, it achieves 52.07 gigaflops per watt, a notable efficiency gain for a system that avoids GPUs entirely. Its design sidesteps U.S. export restrictions by using domestically sourced CPUs, though the exact chip maker remains undisclosed.

Top500 organizers highlighted the growing architectural diversity: three U.S. systems and one German system also breach the exascale barrier, while Frontier, Aurora and Jupiter Booster fall to lower slots. The ranking underscores that no single technology dominates high‑performance computing, and China's achievement signals a shift toward CPU‑centric exascale designs. China now leads the global supercomputing hierarchy.