A HONG KONG solicitor and a corrupt bank employee helped a ring of international counterfeiters swindle banks out of about $4 million, the District Court heard yesterday. About 10,000 credit accounts were drained by mainlanders after a bank employee passed on microfiche containing details of thousands of bona fide credit card accounts, prosecutor Wayne Walsh told the court. Details of the conspiracy came to light during the trial of brothers, hairdressers Mo Hung-fuk, 41, and Mo Kan-leung, 42, who pleaded guilty to conspiracy to defraud and conspiracy to possess false instruments. They were sentenced to 20 months' imprisonment. The syndicate is said to have been based in Shenzhen and Hong Kong. A Hongkong Bank staff member was bribed into providing syndicate members with a microfiche containing information on thousands of credit cards, the court heard. Syndicate kingpin Siu Yiu-man fled Hong Kong in 1992, while on bail for a credit card crime. He oversaw the operation from Shenzhen until November, when the Public Security Bureau arrested him and raided a counterfeit credit-card factory. Hard copy of Hongkong Bank's microfiche was recovered, along with hundreds of bogus cards. Last summer, Siu was said to have called his solicitor Cheng Ki-yeung who, as requested, allegedly instructed his staff to produce a hard copy of the microfiche, which was taken to China by Mo Hung-fuk. The Mo brothers also helped Siu rent space for the illegal factory. Last October, the Independent Commission Against Corruption intercepted a book filled with bogus credit cards on its way to Taiwan for collection by other syndicate members. Cheng was arrested in February and is awaiting trial while Siu is in custody in Guangzhou pending sentencing.