Summary
Confirmed incidents over the past five years have involved Chinese nationals smuggling or illicitly transferring dangerous biological materials into the United States, with additional concerns raised in Canada. The most recent case centers on the sentencing of a postdoctoral researcher at Indiana University for smuggling E. coli plasmid DNA. Previous cases include the smuggling of Fusarium graminearum and roundworm biological materials at the University of Michigan, the operation of illegal biolabs in California and Nevada, and the unauthorized transfer of Ebola and Henipavirus samples from Canada’s National Microbiology Laboratory to China. U.S. authorities have responded with targeted prosecutions, legislative action, and increased biosecurity oversight, while academic organizations have raised concerns about the impact on international research collaboration.
Detailed Report
1. Indiana University, 2026: E. coli Plasmid DNA Smuggling and Sentencing
In April 2026, Youhuang Xiang, a Chinese national and postdoctoral researcher at Indiana University Bloomington, was sentenced in federal court for smuggling E. coli plasmid DNA into the United States. Xiang received a package from China falsely labeled as “women’s underwear,” which actually contained regulated genetic material. During the investigation, Xiang admitted to intentionally falsifying shipping documents and concealing his membership in the Chinese Communist Party from immigration authorities. He pleaded guilty to smuggling and making false statements, resulting in a sentence of time served, a fine, supervised release, and immediate deportation. The case drew attention from both law enforcement and the academic community, with the Indiana University chapter of the American Association of University Professors criticizing the prosecution as a mischaracterization of scientific practice. Federal officials emphasized the seriousness of smuggling biological materials and the risks posed to public safety.
2. University of Michigan, 2024–2025: Fusarium graminearum Smuggling Case
In July 2024, Zunyong Liu, a Chinese national and researcher at Zhejiang University, attempted to enter the United States through Detroit Metropolitan Airport carrying concealed samples of Fusarium graminearum, a fungus classified as a potential agroterrorism weapon due to its capacity to devastate staple crops. Liu hid the samples in tissues inside his backpack and later admitted to smuggling them for research purposes at the University of Michigan, where his girlfriend, Yunqing Jian, was a postdoctoral fellow. Jian coordinated with Liu and contacts in China to smuggle additional samples, instructing a colleague to hide the fungus inside a textbook. Both Jian and Liu were charged with conspiracy, smuggling, making false statements, and visa fraud. Jian pleaded guilty to smuggling and making false statements, was sentenced to time served, and deported. The Department of Justice and FBI described the case as a significant national security concern, though expert testimony indicated the strains involved were genetically modified to be less virulent and unlikely to harm U.S. agriculture.
3. University of Michigan, 2024–2026: Roundworm Biological Materials Smuggling
A separate case involved Chengxuan Han, a Chinese doctoral student, who sent multiple packages from China to the United States containing concealed biological materials related to Caenorhabditis elegans (C. elegans), a roundworm used in genetic research. The packages were addressed to individuals associated with the University of Michigan’s Life Sciences Institute. Han was arrested at Detroit Metropolitan Airport in June 2025 after deleting electronic evidence and making false statements to Customs and Border Protection officers. She admitted to sending between five and ten packages and pleaded no contest to smuggling and making false statements, receiving a sentence of time served and deportation. Following Han’s arrest, three additional Chinese nationals—Xu Bai, Fengfan Zhang, and Zhiyong Zhang—were charged with conspiracy to smuggle biological materials and making false statements. All three were terminated from their research positions and had their visas revoked. In February 2026, charges against Bai, F. Zhang, and Z. Zhang were dismissed, and all three were removed from the United States.
4. California and Nevada, 2022–2026: Illegal Biolabs Operated by Jia Bei Zhu (David He)
Between 2022 and 2026, authorities uncovered clandestine laboratories operated by Jia Bei Zhu, also known as David He, in Reedley, California, and Las Vegas, Nevada. The Reedley facility was discovered in December 2022 and contained thousands of vials with infectious agents, including HIV, malaria, tuberculosis, COVID-19, hepatitis B and C, dengue, chlamydia, human herpes, rubella, E. coli, and genetically engineered mice. The CDC classified many of the pathogens as risk group 2 and 3 agents. Zhu was charged with manufacturing and distributing misbranded and adulterated medical devices, as well as making false statements to the FDA. He remains in federal custody pending trial. Congressional investigations revealed Zhu’s connections to Chinese state-controlled enterprises and unexplained wire transfers from Chinese banks. The CDC’s response to the discovery was criticized for limited engagement and the destruction of potentially dangerous materials without comprehensive testing.
5. Canada, 2019–2021: Unauthorized Transfer of Ebola and Henipavirus Samples
Dr. Xiangguo Qiu and Dr. Keding Cheng, both Chinese-Canadian scientists at the National Microbiology Laboratory in Winnipeg, were investigated for unauthorized transfer of Ebola and Henipavirus samples to the Wuhan Institute of Virology. The couple was escorted out of the laboratory by the Royal Canadian Mounted Police in July 2019, and their security clearances were revoked in January 2021. Investigations by the Public Health Agency of Canada and the Canadian Security Intelligence Service found that Dr. Qiu had collaborated with Chinese government and military entities and facilitated the transfer of dangerous pathogens without proper disclosure. Both were terminated from their positions in January 2021. No criminal charges were filed, but the case remains a focal point in Canadian research security debates.
6. U.S. Policy Response: DOJ China Initiative, BIOSECURE Act, and Enforcement Trends
The U.S. Department of Justice launched the China Initiative in 2018 to prioritize the investigation and prosecution of Chinese economic espionage, illicit technology transfer, and biosecurity threats. According to DOJ statistics, approximately 80% of economic espionage prosecutions allege conduct benefiting the Chinese state, and nearly half of all active FBI counterintelligence cases involve China. The FBI has reported opening a new China-related counterintelligence case every 10 hours. Legislative responses include the BIOSECURE Act, which prohibits federal agencies and recipients of federal funds from procuring biotechnology equipment or services from companies associated with foreign adversaries, specifically naming several Chinese firms. The National Defense Authorization Act for Fiscal Year 2026 includes provisions to improve oversight of biotechnology providers and bio-industrial manufacturing. Enforcement actions have resulted in prosecutions, sentences of time served, deportations, and ongoing investigations.
7. Academic and Civil Liberties Concerns
Academic organizations, including the Indiana University chapter of the American Association of University Professors, have criticized the prosecution of Chinese scholars for technical violations, arguing that such actions risk conflating standard scientific practice with criminal activity and may deter legitimate international collaboration. University officials have responded by revoking research positions and visas for implicated individuals and pledging full cooperation with law enforcement. The debate continues over balancing national security with academic openness and the fair treatment of international researchers.
Conclusion
Multiple confirmed incidents over the past five years demonstrate a persistent pattern of Chinese nationals smuggling or illicitly transferring dangerous biological materials into the United States, with additional concerns raised in Canada. These cases have prompted significant law enforcement and legislative responses, as well as major changes in research security protocols. Ongoing debate continues regarding the balance between national security and scientific collaboration.