Two Chinese citizens, Yunqing Jian and Zunyong Liu, are at the center of a serious criminal case involving the smuggling of a dangerous fungus into the United States. The fungus they are accused of bringing in is called Fusarium graminearum, which can cause severe damage to important crops and is considered a potential agroterrorism weapon.
The Fungus and Why It Matters
Fusarium graminearum is a biological pathogen that can infect wheat, barley, maize and rice. It causes a disease called head blight, which is responsible for billions of dollars in crop losses each year. The fungus also produces toxins that can lead to vomiting, liver damage and reproductive defects in humans and livestock.
The U.S. Attorney’s Office for the Eastern District of Michigan said the fungus “has been described as a potential agroterrorism weapon” because of its ability to destroy crops and damage food supplies. “The alleged actions of these Chinese nationals, including a loyal member of the Chinese Communist Party, are of the gravest national security concerns,” said U.S. Attorney Jerome Gorgon Jr. “These two aliens have been charged with smuggling a fungus that has been described as a potential agroterrorism weapon into the heartland of America, where they apparently intended to use a University of Michigan laboratory to further their scheme.”
How the Fungus Was Smuggled In
According to court documents, Zunyong Liu arrived at Detroit Metropolitan Airport in July 2024. When questioned by authorities, he initially claimed he was visiting his girlfriend, Yunqing Jian, and would be returning to China to start his own laboratory. He said he had no work materials with him. However, during a secondary screening of his luggage, officials found four clear plastic baggies containing small clumps of reddish plant material, along with a note in Chinese and a piece of filter paper with circles drawn on it.
When first questioned, Liu told authorities he did not know how the materials got into his bag. But after further questioning, he admitted he had hidden them himself. “LIU stated that he intentionally hid the samples in his backpack because he knew there were restrictions on the importation of the materials,” the complaint said. “LIU confirmed that he had intentionally put the samples in a wad of tissues so CBP Officers would be less likely to find and confiscate them, and he could continue his research in the United States.”
Authorities did not arrest Liu right away, but the investigation continued. Later, he and Jian were both charged with conspiracy, smuggling goods, making false statements and visa fraud.
Their Background and Ties to the Chinese Government
Investigators allege that Jian worked at the University of Michigan and had received funding from the Chinese government for her research on this dangerous fungus. The Justice Department also said that Jian’s electronics contained information showing she is a member of the Chinese Communist Party. Liu also works at a Chinese university and does research on the same fungus.
Attorney General Pam Bondi said in a statement that the Justice Department’s top mission is to protect Americans. “Thanks to the hard work of our excellent DOJ attorneys, this defendant — who clandestinely attempted to bring a destructive substance into the United States — will face years behind bars,” she said.
Could This Be Agroterrorism?
Federal officials have not charged Jian and Liu with terrorism, but they said the fungus is considered a potential agroterrorism weapon. U.S. Customs and Border Protection Director of Field Operations Marty Raybon said, “Today’s criminal charges levied upon Yunqing Jian and Zunyong Liu are indicative of CBP’s critical role in protecting the American people from biological threats that could devastate our agricultural economy and cause harm to humans.”
Special Agent in Charge Cheyvoryea Gibson from the FBI’s Detroit office said, “The federal charges announced today against Yunqing Jian and Zunyong Liu, both residents of the People’s Republic of China, signify a crucial advancement in our efforts to safeguard our communities and uphold national security.”
University of Michigan’s Response
The University of Michigan released a statement late Tuesday, saying, “We strongly condemn any actions that seek to cause harm, threaten national security or undermine the university’s critical public mission.” The statement added that the university “has received no funding from the Chinese government in relation to research conducted by the accused individuals” and will continue to cooperate with federal investigators.
Jian appeared in federal court in Detroit for her initial hearing. She has not yet entered a plea. The court documents say she and Liu were dating and were working together to bring the fungus to the University of Michigan lab where Jian worked.
What Lies Ahead
The FBI and CBP are leading the investigation. Officials say this case is not over yet and more information could come out in the future. As of now, there is no clear evidence that Jian and Liu were planning to use the fungus as a biological weapon, but the charges are serious because of the potential risk to America’s food supply and economy.
“This was a complex investigation involving CBP offices from across the country, alongside our federal partners,” said Raybon. “I’m grateful for their tireless efforts, ensuring our borders remain secure from all types of threats while safeguarding America’s national security interests.”
While Jian and Liu await further hearings, their case is a stark reminder of the need to be vigilant about biological materials and the potential threats they can pose. It also shows the tension between the U.S. and China, as the government looks closer at Chinese researchers and their ties to the Communist Party.
Jian and Liu’s future will now be decided in court, but their case has already raised big questions about security, research and the risks of biological threats crossing international borders.