A Czech businessman detained in China since late June has now been charged with espionage. Diplomatic cables, according to the EUobserver confirm the Czech citizen has been charged, with “obtaining and passing on information.” The timing, coming after a Czech court pushed back on the indictment, requesting more information, against a Chinese national held in Prague, points to classic hostage diplomacy. Travel warnings describing this tactic have been previously issued by both the U.S. and UK.
China’s hostage tactics
In January 2026 Czech authorities detained Yang Yiming, a Chinese national working as a correspondent for the CCP-affiliated Guangming Daily. He was charged with unauthorized activity for a foreign power, the first use of that statute. He remains in pre-trial detention.
Prosecutors filed the indictment in May. On June 12, the Prague Municipal Court refused to accept it, returned the case for further investigation, and ordered Yang released from custody. Prosecutors appealed both decisions the same day. Because the appeal is pending, the release order never took effect. Yang stays locked up. The High Court is expected to rule on the detention appeal by mid-September.
Roughly two weeks after that court decision, Chinese security services detained a Czech businessman at a Chinese airport. He is linked to Eldis, a radar firm under the Czechoslovak Group. The kicker, he was there as a guest of China, having been invited by Chinese authorities to visit China so as to obtain radar certification for work associated with Eldis.
For more than a month Chinese authorities kept the specific charge opaque, speaking only of endangering national security. This week diplomatic correspondence obtained by Deník N and reported by EUobserver confirmed the charge is espionage: “obtaining and passing on information” (not further identified). The first consular meeting, held in early July inside a windowless interior-ministry room, was controlled by three security officers who repeatedly interrupted the conversation. It is important to note that the interruptions and admonishments for the detainee not to answer often times centered around consular questions along the lines of, “Do you know why you are being detained?”
In what appears to be diplomatic courtesy, Czech officials publicly deny any connection between the two cases. The timing and Chinese statements point the other way. Beijing had already been demanding Yang’s release and calling the charges against him trumped-up. Once the Czech court signaled the case was not moving cleanly toward trial and that release was at least on the table, Beijing had both motive and opportunity to create its own leverage. This is how the pattern of hostage diplomacy works.
One of theirs is held. They manufacture a case against one of yours. Pressure follows.
Foreign travel warnings exist
U.S. State Department guidance keeps mainland China at Level 2, Exercise Increased Caution. The PRC government “arbitrarily enforces local laws, including exit bans on U.S. citizens without fair and transparent process under the law.” Foreigners, including businesspeople, academics, former government personnel, and journalists, “have been interrogated and detained by PRC officials for alleged violations of PRC national security laws.” U.S. citizens “may be detained without access to U.S. consular services” and “subjected to interrogations and detention without fair and transparent treatment under the law.”
The UK Foreign Office uses nearly identical language. Chinese national security laws “have broad scope, and you can be arrested without having intended to break the law.” Activity that happened outside mainland China, including online activity, can fall under Chinese jurisdiction.
Both governments are describing the same reality. China does not need a genuine violation. Vague statutes and the ability to reach back to online activity conducted outside the country give Beijing the tools to invent the justification it needs.
Two recent cases of U.S. citizens being detained under spurious charges are those of Youlin Chen and U Min Zin.
Youlin Chen (Boston-based seismologist)
Detained 5 November 2024 at Beijing Capital International Airport while preparing to fly home after a family visit and academic lectures. Charged with espionage in May 2025. Designated “wrongfully detained” by the U.S. State Department in March 2026. Still held as of July 2026 (more than 600 days). His research involved U.S.-funded work on detecting North Korean nuclear tests.
U Min Zin (Myanmar politics scholar and think-tank director)
Detained early June 2026 in Kunming. Chinese authorities confirmed he is under criminal detention on suspicion of “engaging in espionage activities that endanger China’s national security.” U.S. diplomats have visited him.
FSO’s travel briefs
FSO travel briefs should be unambiguous.
Chinese national-security laws are broad and can be applied after the fact. Online posts, research, professional contacts, or commentary made outside China can later be cited as evidence. Exit bans are real and frequent. Travelers often learn of them only when they try to leave. Dual nationals and those of Chinese heritage face elevated risk. China does not recognize dual nationality and may limit or block consular access. Consular assistance is limited to visits and lawyer lists. It cannot secure release. Require STEP enrollment or the national equivalent, detailed itineraries, check-in protocols, and sanitized devices only. Assume no privacy on networks, hotel rooms, or electronics.
Hostage diplomacy is not unique to China
Iran and Russia run the same playbook. Both detain foreign nationals or dual citizens on vague national-security or espionage charges, then convert them into leverage for prisoner swaps or broader negotiations. U.S. citizens are repeatedly advised not to travel to either locale.
