Two members of a syndicate that helped women from the Philippines stay in Hong Kong to work as prostitutes were jailed yesterday for two years. Interior designer Dominic Ko Che-hong, 35, and decoration worker Yeung Wai-kuen, 45, plotted to defraud the Immigration Department using a bogus marriage certificate, the District Court heard. Ko submitted the bogus certificate on September 16, 1995, claiming he had married Filipina Lory Taguiam de Leon, 26. Prosecutor Ong Choo-neo said Ko was recruited by Yeung, who helped Philippine women to work in Hong Kong as prostitutes. Deputy Judge Stephen Geiser sentenced the pair after they pleaded guilty to a charge of conspiracy to defraud. 'This type of offence is serious in my view as it strikes at the very root of the integrity of the immigration system,' the judge said. Lawyer Boey Chung, defending, said the pair were only 'pawns' in the scam and were instructed to work by others. When the women obtained a visa to stay in Hong Kong, their 'husbands' would be given between $3,000 and $35,000, depending on the length of stay they were given by the Immigration Department, the prosecution said.