China detains US scientist who studied North Korea nuclear tests
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- Chen Youlin, 54, a US seismologist who tracks nuclear tests, was arrested in Beijing in November 2024 during a family visit and remains the only US citizen currently designated 'wrongfully detained,' nearly two years later.
- Chen's wife Rong Yufang said Chinese authorities interrogated him more than 100 times and barred him from seeing a lawyer for the first 13 months; she has not spoken to him in over 600 days.
- China's foreign ministry rejected the wrongful detention label at a Tuesday briefing, telling reporters its 'judicial authorities handle cases in accordance with the law' — espionage convictions in China can carry life imprisonment or the death penalty.
- Global Reach said suspicions within the US government hold that Chen's arrest was spurred by China's own covert nuclear testing, and that his seismic expertise could help Beijing build countermeasures against US detection of treaty violations.
- Chen, born in China and naturalized as a US citizen in 2011, published work centered on North Korea's nuclear program; a December 2020 study used seismic data recorded across Asia, including China, to improve nuclear-test monitoring and yield estimation.
- Senator Edward Markey (D-MA) said Beijing's treatment of Chen 'undermines' the US-China partnership and may deter academics from engaging with Chinese colleagues; the case emerged a month after China arrested another US scholar, Min Zin, on similar espionage charges.
Why it matters: Chen's case is the sole active 'wrongfully detained' American, giving Beijing leverage in any future US-China negotiations while chilling the scientific exchanges both governments publicly endorse. With espionage charges carrying sentences up to life or death and 100+ interrogations already conducted, Chen's diabetes, high blood pressure, and high cholesterol raise the stakes of every additional day in custody.
