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FBI’s ‘Operation Box Cutter’ Targets Chinese Pharmaceutical Companies and Cartel Assets in Major Fentanyl Crackdown

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EXCLUSIVE: In a significant legal development, the Justice Department has charged six Chinese nationals and two pharmaceutical companies based in China with allegedly trading chemical components for fentanyl production, intended for illicit entry into the United States. These entities are also accused of collaborating with a Mexican drug cartel.

These charges were brought forth by a federal grand jury in Dayton, Ohio, against Shandong Believe Chemical Company, Shandong Ranhang Biotechnology, and individuals identified as Hanson Zhao, Gao Yanpeng, Xia Yi, Zhang Jian, Wang Zhoalan, and Zhang Chunhai.

These legal actions are a direct result of Operation Box Cutter, an FBI-led initiative aimed at dismantling the international supply chain of fentanyl precursors. The operation saw collaboration with China’s Ministry of Public Security, which contributed valuable intelligence, according to officials.

Chinese flag and evidence of fentanyl

The Justice Department highlighted the indictment of these entities as part of a larger fentanyl conspiracy case. ((Paul Yeung/Bloomberg via Getty Images and Thomas Simonetti/Bloomberg via Getty Images))

Speaking to Fox News Digital, FBI Director Kash Patel described Operation Boxcutter as a groundbreaking achievement, marking the first time such comprehensive indictments, including charges of material support for terrorism, have been achieved. He emphasized the historic collaboration with Chinese authorities following a pivotal meeting last year aimed at disrupting the supply of critical precursors and tackling the fentanyl epidemic.

The drug companies allegedly used Zhao, Yanpeng, Yi, Jian, Zhoalan and Chunhai to solicit, negotiate, and secure payments for illegal cutting agents from U.S. customers. 

From July 2025 through January 2026, the companies allegedly used the six defendants to openly market, sell and deliver various chemical precursors intended for domestic and foreign drug traffickers to make fentanyl destined for the U.S. 

The U.S. customers were directed to pay for the agents using cryptocurrency transferred to crypto wallets, with the funds ultimately being deposited into foreign financial institutions, federal prosecutors said. 

FBI Director Kash Patel speaks at a podium during a news conference inside the Justice Department.

FBI Director Kash Patel speaks during a news conference at the Department of Justice. (Daniel Heuer/AFP via Getty Images)

The defendants allegedly conspired to manufacture and distribute 400 grams or more of fentanyl mixture. In addition, three defendants allegedly also sold chemical precursors and medetomidine to a member of the Cártel del Golfo, also known as the Gulf Cartel, which has been designated a foreign terrorist organization by the State Department. 

Throughout the operation, China’s Ministry of Public Security provided the FBI with intelligence that helped “advance our understanding” and investigation of Shandong Believe Chemical Company and its criminal network, Joe Perez, the FBI operations director, said in a statement. 

“Thanks to that collaboration, these indictments will serve as an important message to all those who engage in similar conduct that the FBI will bring them to justice,” he said. 

Drug traffickers use chemical precursors to manufacture fentanyl and other substances known as “cut” to increase the quantity of doses available for sale, the Justice Department said. 

Fentanyl is often cut with medetomidine, an animal tranquilizer up to 200 times more powerful than morphine, authorities said. Medetomidine can increase the yield of a single kilogram of fentanyl at least twenty-fold, producing millions of dosages for street level sales, officials said.

China began tightening fentanyl precursor controls following Patel’s visit to the country last year in which he held discussions with his Chinese counterparts and Chinese government officials.

“This was a historic trip for the FBI and America’s national security – the first time in a decade that an FBI Director has been to China and received an audience with his counterpart to discuss the fentanyl crisis,” Patel said in an exclusive statement to Fox News Digital at the time. 

He noted that the crisis doesn’t start at the southern border, but rather with the flow of chemical precursors and the networks that move them.
 

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