Ten people have been arrested over an alleged US$75 million (HK$580.5 million) foreign exchange fraud in Guangdong. Staff at Dayawan New Technology Development Centre, in Huizhou, were said to have used more than 300 fake Customs reports and import papers to swindle cash from the Bank of China since May 1996. Suspicion fell on the firm when officials found it allegedly used 61 fake bills amounting to nearly US$20 million to illegally convert yuan to foreign currency. Among those arrested were the company's general manager and his wife who were detained at a Shenzhen border crossing and Guangzhou airport respectively, said Xinhua. In a separate case, eight people in Shenzhen were detained in a US$4.77 million fraud case also involving foreign currency. An unidentified company used false Customs reports to change yuan into foreign money even though it never engaged in foreign trade. The cases, which are still being investigated, come amid a national crackdown on foreign exchange fraud.