In the early hours of 6 May 2004, a Japanese diplomat took his own life inside the Shanghai consulate. His farewell notes described Chinese agents who exploited his affair with a karaoke hostess. Tokyo later confirmed the case, which offers a rare window into Chinese honeytrap espionage. For decades, this craft has turned private desire into state leverage across diplomacy, defence and business.
A death in Shanghai
The 46-year-old official ran the consulate’s encrypted communications section. His pursuers wanted code systems, colleagues’ names and details of flights carrying classified documents to Tokyo. One note made clear he would not hand over secrets. In March 2006, Chief Cabinet Secretary Shinzo Abe blamed “cruel intimidation and threats by Chinese intelligence officers”. Tokyo had already lodged four protests with Beijing. Its Foreign Ministry had stayed silent for more than 18 months until Japanese media broke the story in December 2005. China rejected the charge and blamed work-related stress instead.
The pattern did not end there. In 2006, Japanese police probed a naval petty officer who kept visiting a woman at the same karaoke bar.
The butterfly precedent
The playbook long predates Shanghai. In 1964, Bernard Boursicot, a 20-year-old accountant at the French embassy in Beijing, met Shi Pei Pu. Shi, a Peking opera singer, persuaded Boursicot that he was secretly a woman. Their affair spanned almost two decades, and Shi even claimed they had a son. Boursicot later said that fear for Shi’s life drove him to pass embassy documents to a Chinese agent. French police arrested the pair in 1983. In 1986, a court convicted both men and sentenced each to six years. President François Mitterrand pardoned Shi in 1987 as France sought to ease tensions with China. Their story later inspired the Tony-winning play M. Butterfly.
The mechanics rarely change. Former FBI operative Eric O’Neill describes the honeytrap as a long game. The operative builds intimacy through flirtation, sex and repeated meetings. Recordings then supply leverage. If the target wavers, blackmail follows, exploiting both the affair and any secrets already shared.
From embassies to boardrooms
By the 2000s, British counter-intelligence watched the same craft move into corporate espionage. In 2008, MI5’s Centre for the Protection of National Infrastructure drafted a 14-page paper, The Threat from Chinese Espionage. MI5 circulated it to hundreds of British banks, financial institutions and businesses. It followed a late-2007 MI5 letter that warned some 300 business leaders about Chinese state-sponsored hacking. The paper described undercover officers who courted executives at trade fairs with gifts and lavish hospitality. Some gifts, such as cameras and memory sticks, carried Trojan bugs. It also warned that Chinese services “exploit vulnerabilities such as sexual relationships and illegal activities” to pressurise targets. Hotel rooms in Beijing and Shanghai, it cautioned, probably hid listening devices.
Politics offered no shelter. In January 2008, a senior aide to Gordon Brown joined colleagues at a Shanghai hotel disco. A woman approached him, and the pair returned to his hotel. Next morning, he reported his BlackBerry missing. Downing Street later gave the aide an informal reprimand. Beijing dismissed the story as a fabrication.
Whitehall did not forget. Before the 2016 G20 summit in Hangzhou, security chiefs warned Theresa May’s team about honeytraps. They issued temporary phones and email addresses. Staff even heard advice to undress beneath their bedclothes.
Generals, handlers and rising stars
Taiwan felt the damage at the top of its army. Its defence ministry said Chinese agents recruited Major General Lo Hsien-che in 2004, during a posting in Thailand. Local media described a glamorous woman in her early thirties who posed as a trader. The ministry declined to comment on the sex allegations. Lo passed repeated loyalty checks and won promotion to major general in 2008. A military court jailed him for life in 2011. Taiwanese media put his earnings at about US$1 million. Taiwan’s top court upheld the sentence in 2012. Military officials called it the worst communist espionage case in half a century.
Intimacy can also blind the spy-catchers. In the early 1980s, FBI agent James J. Smith recruited Katrina Leung as an informant. The bureau codenamed her “Parlor Maid” and paid her US$1.7 million over nearly two decades. Prosecutors alleged a 20-year affair with Smith. They accused her of copying classified documents and briefing Chinese officials. A second FBI agent, William Cleveland, also had an affair with her. In 1991, Cleveland recognised her voice on an FBI intercept of a call to a Chinese intelligence officer. Yet both agents kept sharing case details with her. Prosecutors eventually accepted her guilty pleas to lesser charges.
Christine Fang played a longer game. From 2011 to 2015, the Chinese national courted rising Californian politicianswhile studying at California State University, East Bay. She also served as president of its Chinese Student Association. US officials believe China’s Ministry of State Security directed her. She helped raise funds for Congressman Eric Swalwell’s 2014 re-election campaign. Current and former US intelligence officials also alleged romantic or sexual relationships with at least two Midwestern mayors. Investigators alerted Swalwell in 2015, and he immediately cut ties. Officials have not accused him of any wrongdoing. Fang left the United States abruptly that year. US officials do not believe she ever obtained classified information. Bureau officials instead called her work a “long game play” targeting local politicians.
Silicon Valley’s new front line
Today the honeytrap targets code and capital as much as diplomatic cables. In October 2025, US counter-intelligence veterans warned of “sex warfare” against America’s technology sector. They named China and Russia as the chief culprits. Some operatives, the veterans claim, even marry their targets and start families. James Mulvenon, chief intelligence officer at Pamir Consulting, described a flood of sophisticated LinkedIn requests from attractive young Chinese women. He argues that American law and culture forbid such tactics, handing adversaries an “asymmetric advantage”. He also recalled security staff turning away two women from a Virginia investment-risk conference. Both women knew striking details about the attendees.
Experts stress that seduction forms only one strand of Beijing’s wider economic statecraft. They describe start-up contests that harvest business plans and Chinese investors who seek leverage over defence-linked firms. In February 2025, a House committee linked the Chinese Communist Party to over 60 US espionage cases in four years. FBI figures show that about 80 per cent of economic espionage prosecutions allege conduct benefiting China.
The oldest exploit
Firewalls cannot patch loneliness, vanity or ambition. That human weakness explains why honeytraps endure in an age of cyber espionage. Western security services now warn diplomats, executives and technologists alike. Yet each new case shows how easily desire slips past training. Two decades on, the Shanghai notes still carry the bleakest warning. The most damaging breach often begins with a smile, not a line of code.
Chinese honeytrap espionage
