China conducts secret nuclear test? US reels, calls on world to stop Beijing’s bomb build‑up​on February 24, 2026 at 11:18 pm

A senior US arms control official presented what he described as declassified evidence of a suspected underground nuclear test by China in 2020. His claims were based on seismic data recorded at a monitoring station in a neighbouring country. A senior US arms control official presented what he described as declassified evidence of a suspected underground nuclear test by China in 2020. His claims were based on seismic data recorded at a monitoring station in a neighbouring country.