Washington D.C. – Federal prosecutors in the United States have unsealed charges against two citizens of the People’s Republic of China (PRC) and arrested a third individual in separate but potentially linked cases involving the alleged smuggling of dangerous biological materials into the United States. The incidents have triggered alarm among U.S. lawmakers, who have raised pointed questions about national security vulnerabilities and the integrity of American research institutions.
A letter dated June 18, 2025, from a U.S. Select Committee underscored deep concern over recent reports and criminal charges that involve PRC nationals with alleged direct ties to the Chinese Communist Party (CCP). The committee highlighted allegations that these individuals were involved in smuggling dangerous biological materials into the United States, intended for use at University of Michigan (UM) laboratories.
Charges Detail Alleged Conspiracy and Smuggling
The U.S. Department of Justice (DOJ) filed charges on June 2, 2025, against Yunqing Jian and Zunyong Liu, both identified as citizens of the PRC. The charges against Jian and Liu include conspiracy, smuggling goods into the United States, making false statements, and visa fraud.
According to public reports cited by the U.S. Select Committee, Jian and Liu allegedly attempted to smuggle Fusarium graminearum into the United States. Fusarium graminearum is described as a toxic fungus and a potential agroterrorism agent. This pathogen is known to cause “head blight” in vital food crops such as wheat, barley, maize, and rice. The resulting damage leads to billions of dollars in annual agricultural losses worldwide.
The charges further suggest that Jian and Liu conducted research under or in concert with professors at the University of Michigan. This research was reportedly funded by U.S. taxpayer dollars through grants from the National Institutes of Health (NIH) and the National Science Foundation (NSF).
A Pattern of Concern Emerges
Just five days after the charges against Jian and Liu were unsealed, authorities arrested Chengxuan Han on June 8, 2025. Han faces charges of smuggling biological materials into the U.S. and making false statements to border officials. While the specific materials allegedly smuggled by Han were not detailed in the committee’s letter, his arrest added to what lawmakers described as a troubling pattern of incidents.
The U.S. Select Committee’s letter also drew a connection to a previous incident involving an illegal biolab discovered in California. That facility, reportedly run by a PRC national, was found to contain thousands of unlabeled pathogen samples. Disturbingly, authorities discovered a freezer within the lab labeled “Ebola,” a pathogen designated as a CDC-designated Select Agent due to its potential for use in biological warfare or terrorism.
National Security Implications and Policy Questions
The convergence of these cases has intensified scrutiny on the security of U.S. research ecosystems, particularly those handling sensitive biological materials and funded by federal agencies. The Select Committee’s letter explicitly stated that Chinese researchers with ties to the PRC defense research and industrial base should not be permitted to participate in U.S. taxpayer-funded research that carries national security implications, especially when it involves dangerous biological materials.
Lawmakers and security experts are now questioning whether these incidents point to potential non-compliance with existing regulations and significant gaps in U.S. research security protocols. This scrutiny comes despite federal efforts designed to protect intellectual property and sensitive research, including measures outlined in National Security Presidential Memorandum 33 and various congressional directives.
The cases of Jian, Liu, and Han, coupled with the discovery of the California lab, highlight ongoing challenges in preventing the unauthorized transfer of sensitive biological agents and research expertise. They underscore the increasing concerns in Washington regarding the potential for foreign adversaries to exploit open research environments for strategic or malicious purposes, posing risks not only to national security but also to public health and agricultural stability.
The DOJ has not yet released further details beyond the initial charge documents, and it remains unclear how the cases of Jian, Liu, and Han are formally connected, if at all. However, the U.S. Select Committee’s vocal concerns signal a heightened level of congressional attention on the issue of foreign influence and potential illicit activity within the American scientific community.
