A woman accused of laundering Bitcoin to help hide some of the proceeds of a multi-billion dollar fraud was jailed for almost seven years by a London court, according to media reports.

Former fast-food worker Wen Jian, 42, who has both UK and Chinese citizenship, was convicted of one count of laundering 150 Bitcoin, worth more than $10 million today.

In their investigation into the larger fraud, British police seized wallets holding more than 61,000 Bitcoin worth more than $4bn today, part of assets stolen from 130,000 Chinese investors between 2014 and 2017.

Wen played a relatively small part in the crime, and was not accused of participating in the larger fraud, which prosecutors said was masterminded by another person.

Wen was accused of three counts of money laundering, and convicted of one in a jury trial in March. She was sentenced to six years and eight months in jail.

The presiding judge said while it was clear Wen had no involvement in the larger fraud, there was no doubt that she was aware that the Bitcoin she laundered was criminal property.