Police seized 61,000 Bitcoin from Zhimin Qian, 47, as part of a years-long money laundering investigation.

The United Kingdom has sentenced a Chinese woman to 11 years and eight months in prison for a years-long scheme to launder investment scam proceeds into Bitcoin, luxury property, and other assets now worth about 4.8 billion British pounds ($6.3bn).

Zhimin Qian, 47, was sentenced by the Southwark Crown Court in London on Tuesday, in a case that saw UK police seize a record-breaking 61,000 Bitcoin as part of their investigation.

Qian, who is also known by the alias Yadi Zhang, was found guilty of money laundering and possessing illegally obtained cryptocurrency.

Will Lyne, the Metropolitan Police’s head of Economic and Cybercrime Command, described the case as “one of the largest and most complex economic crime investigations ever undertaken by the Met”.

“This is currently the largest cryptocurrency seizure by law enforcement in the UK and is the largest money laundering case in UK history by value,” he said in a statement.

UK authorities allege that Qian helped mastermind an investment scam in China between 2014 and 2017 that defrauded 128,000 people out of roughly £4.6bn, according to sentencing remarks from Judge Sally-Ann Hales.

Much of the funds were later recovered by police in China, but Hales said that a “sizeable amount was siphoned off and used by” Qian, and transferred into 70,000 Bitcoin stored on a laptop wallet.

Qian fled China in 2017, spending the next seven years on the run, and travelling between the UK and other countries without an extradition agreement with China.

Qian and an accomplice, who has since been sentenced, came to the attention of UK authorities in 2018, when Qian tried to buy three London properties worth 40.5 million pounds ($53.2m) but failed “know your customer” regulations, according to the Crown Prosecution Service.

Qian disappeared from the UK in 2020, but not before police seized items from a safe deposit box, including a laptop smuggled from China.

Hales said that documents found during the search “give an indication of the level of the defendant’s monthly expenditure, and the grandiose ambitions she held for her future using the proceeds of her criminal conduct”.

Qian returned to police attention last year, when she began to use a dormant wallet with the help of a second accomplice, Senghok Ling, 47, a Malaysian national based in the UK.

When police arrested Ling and Qian in April 2024, the pair was living a “lavish” lifestyle in the UK, according to Hales. At the time, Qian was found in possession of 62 million pounds ($81.4m) worth of cryptocurrency, a large quantity of cash, and two false passports.

Ling was separately sentenced to four years and 11 months in prison.

Richard Hermer, Attorney General for the UK and Wales, on Tuesday praised the sentencing of “two prolific fraudsters”, who together “caused misery upon thousands of victims to fund their lavish lifestyles”.