China has temporarily stopped building the world’s largest particle accelerator — the Circular Electron-Positron Collider (CEPC). This collider was planned to be about 100 km long, three times longer than the Large Hadron Collider (LHC) in Europe, which is 27 km long.

The CEPC project began in 2012, after CERN discovered the Higgs boson. However, it was not included in China’s new five-year plan for 2026–2030. It seems that the project is considered less of a priority, so it will receive less funding and resources.

Wan Yifan from the Institute of High Energy Physics confirmed this change. The Chinese team plans to submit the CEPC proposal again in 2030. The estimated cost of the project is around $5.1 billion.

If Europe approves its new FCC accelerator, construction could begin in the 2030s. Chinese physicists may join this project if their proposal is approved.

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