The Metropolitan Police has secured a conviction in what they described as the world’s largest cryptocurrency seizure, a case that has pulled back the curtain on the scale of fraud and laundering tied to Chinese criminal networks.
Zhimin Qian, a 47-year-old Chinese national also known as Yadi Zhang and “Bitcoin Queen,” pleaded guilty at Southwark Crown Court to acquiring and possessing criminal property. Prosecutors said she attempted to launder tens of billions in stolen funds through the U.K. after orchestrating a massive fraud scheme in China between 2014 and 2017.
Investigators traced roughly 61,000 Bitcoin, now valued at £5.5 billion (about $7.3 billion), to wallets controlled by Qian. Authorities believe the funds came from fraudulent investment schemes that duped more than 128,000 victims in China, many of whom were promised outsized returns through Tianjin Lantian Gerui Electronic Technology.
A Raid that Unlocked Billions from the Bitcoin Queen
The breakthrough came in October 2018, when officers raided a property in London and seized laptops and hard drives. Inside were private keys granting access to wallets holding the massive stash of Bitcoin. The case quickly escalated into an international operation, with U.K. detectives working alongside Chinese law enforcement, the National Crime Agency, and the Crown Prosecution Service (CPS).
“This was a meticulous investigation and unprecedented cooperation with Chinese law enforcement,” said Will Lyne, head of the Met’s Economic and Cybercrime Command. “We were able to obtain compelling evidence of the criminal origins of the cryptoassets Qian attempted to launder in the U.K.”
From Investment Scam to Global Laundering
Authorities said Qian fled China on false papers as pressure mounted, converting stolen funds into Bitcoin to evade seizure. Once in the U.K., she sought to integrate the assets into the economy through property deals and other transactions.
Her associate, Jian Wen, was convicted in 2024 for helping to move the crypto and sentenced to prison. Both women became central figures in what investigators described as a sophisticated laundering scheme that exploited the pseudonymous nature of digital assets.
The Technical Hunt
Forensic analysts had to untangle the chain of custody for the seized wallets, piecing together how private keys were stored, transferred, and ultimately controlled. Investigators emphasized that the technical challenge was as much about timing as expertise—access to seized devices made it possible to freeze and control the funds before they could be moved again.
The CPS has now launched proceedings to confiscate the Bitcoin permanently. “We will ensure, through criminal confiscation and civil proceedings, that the criminal assets remain beyond the fraudsters’ reach,” the agency said in a statement.
Global Stakes and Diplomatic Tensions
The unprecedented seizure has drawn attention not only from financial crime experts but also from diplomats. With billions at stake, Chinese officials are pressing for the funds to be returned to victims, while U.K. authorities weigh asset recovery processes under British law.
Qian now awaits sentencing, while U.K. prosecutors pursue follow-on actions to ensure the seized Bitcoin remains out of criminal hands. But the broader battle against crypto-enabled fraud is far from over. With billions in stolen assets still in circulation worldwide, law enforcement agencies say cases like this may only be scratching the surface.
