US seismologist known for tracking nuclear tests detained by China on espionage charges 47%
By Sujita Sinha28%
7/15/2026, 9:17:27 AM
BS Summary: This article contains 25 faulty reasoning types, including Negativity Bias, Confirmation Bias, and Self-Serving Bias, with Appeal to Authority as the most egregious example at 21.6% saturation with 141 hits. Analysis detected 1,354 faulty-reasoning hits from 654 analyzed words, generating a BS Score of 48.7% and a BS Rank of 47% (11,289 of 21,164 articles). This article is better (less manipulative) than 53.30% of the article peer group.
A U.S. seismologist who specializes in detecting underground nuclear tests has been held in China for nearly two years on espionage charges, with his family speaking publicly about the case this week after seeing no indication that Beijing plans to release him.
Chen Youlin, 54, was arrested during a family visit to Beijing in November 2024, according to hostage advocacy group Global Reach.
The case gained renewed attention this week after Chen’s wife and supporters appealed for his release, raising concerns about his health and questioning the allegations against him.
Family rejects espionage allegations
Chen’s wife, Rong Yufang, who is also a seismologist, said her husband has always worked openly with Chinese researchers and denied that his scientific collaborations involved espionage.
His published research has largely focused on North Korea’s underground nuclear tests and improving methods to detect such explosions using seismic data.
“My husband worked closely with Chinese colleagues, and the allegations are both wrong and inconsistent with the public and collaborative nature of the work that he has done.”
Rong said she has been unable to communicate with her husband for more than 600 days.
“I have not been able to speak with my husband for over 600 days and am concerned for his health and well-being,” she said in a statement released through Global Reach.
As reported by Reuters , she said Chinese authorities questioned Chen more than 100 times about his work and did not allow him to meet a lawyer during the first 13 months of his detention.
Born in China, Chen became a U.S. citizen in 2011 and lives in Boston, Massachusetts.
Research linked to nuclear test monitoring
Chen’s research focuses on using seismic waves to identify underground nuclear explosions.
He participated in several U.S. government-funded research projects and, according to Rong, all collaborations with Chinese scientists were conducted transparently.
“He is doing precisely the kind of people-to-people engagement that the Chinese government says it wants,” she added .
One of his studies, published in December 2020, analyzed seismic data collected across Asia, including China, to improve detection of nuclear tests and estimate the size of underground explosions.
Global Reach said there are “suspicions within the US government that Chen’s arrest was spurred by China’s conduct of nuclear tests in violation of the Comprehensive Nuclear Test Ban Treaty”.
The advocacy group also argued that Chen’s expertise could help China better understand U.S. seismic monitoring methods and develop ways to avoid detection.
China has denied allegations that it conducted secret nuclear tests , despite previous U.S. intelligence assessments suggesting the country is expanding its nuclear arsenal.
Health concerns grow during detention
The Foley Foundation, another U.S.-based hostage advocacy group, warned that Chen’s health has become a growing concern because he has diabetes, high blood pressure, and high cholesterol.
“He needs reliable access to treatment and care that is not available while he is unjustly incarcerated,” the organization said.
When asked about the case on Tuesday, Chinese Foreign Ministry spokesperson Lin Jian said that the country’s judicial authorities handle cases in accordance with the law.
“There is no such thing as so-called wrongful detention,” Lin said.
Under Chinese law, espionage convictions can carry life imprisonment or the death penalty.
U.S. lawmakers seek Chen’s release
Chen is currently the only U.S. citizen officially designated as “wrongfully detained” by the United States.
U.S.
Senator Edward Markey of Massachusetts said the case could discourage scientific cooperation between American and Chinese researchers.
“It is my hope that increased attention on his unjust detention will force the Chinese government to do the right thing and release Chen,” he said in a statement released Tuesday.
The disclosure of Chen’s detention comes about a month after China confirmed the arrest of another U.S. scholar, Min Zin, director of a Myanmar-focused think tank.
Chinese authorities have accused Min Zin of spying and endangering national security.
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