The Guardian - Publicerad för för 16 timmar sedan

China has detained US nuclear seismology expert since 2024, family reveals

Beijing may be using Youlin Chen’s knowledge to devise ways of staging nuclear tests without detection, advocates for his release from spying charges suggest

An American seismologist has been detained in China on espionage charges since 2024, his family has revealed, saying Donald Trump’s direct appeal for the scientist’s release to his Chinese counterpart, Xi Jinping, went unanswered.

Youlin Chen – who has researched how to detect underground nuclear tests using seismological data – was detained on 5 November 2024, according to a statement from the NGO Global Reach, which is working with his family to secure his freedom.

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