Ka Sing Lai, a 30-year-old Hong Kong national living in Sydney, was one of nine individuals arrested and charged in connection to the Hong Kong-based cartel.
Lai flew to Perth from Sydney 13 times in 2015, where he collected up to AUS$ 500,000 (US$ 377,000) in cash at a time from numerous contacts, WA Today reported.
He would then pick up his money runners in hire cars and drive them to up to 10 banks a day to deposit the cash in nominated accounts, according to The West Australian.
Lei was found guilty of personally laundering AUS$ 5.9 million (US$ 4.5 million) through Westpac and Commonwealth Bank accounts that were registered as belonging to newly established Australian companies, the directors of which were Hong Kong nationals based elsewhere.
The money was then funneled offshore.
One of the contacts who Lai collected from was Cheng Fatt Chow, a key target in a separate investigation into Asian meth dealers in Perth.
Authorities began following the money trail after spotting enormous cash deposits into the accounts of otherwise unknown companies. Between March and December 2015, AUS$ 29 million (US$ 21.8 million) had flowed through these accounts.
When Lai was arrested in December 2015, police found over AUS$ 230,000 (US$ 166,800) in his rental car, six mobile phones and several debit cards, WA Today reported.
