[size=1.6]Italian prosecutors want to indict the Bank of China's Milan branch and almost 300 people over a money-laundering scheme.
[size=1.6]Prosecutors in Florence allege €4.5bn ($5.1bn, £3.2bn) was transferred from Italy to China.
[size=1.6]It was earned through prostitution, counterfeiting, tax evasion and labour exploitation, they say.
[size=1.6]The Ansa agency said (in Italian) that four senior managers with the Bank of China could be indicted.
[size=1.6]Close to half the €4.5bn, transferred between 2007 and 2010, went through the bank's branch in Milan, investigators say.
[size=1.6]The Bank of China received €758,000 in commission for the transfers, it is claimed.
[size=1.6]There were millions of transactions, Ansa said, that were below the €2,000 threshold that would have triggered money-laundering checks.
[size=1.6]That threshold has since dropped to €1,000.