A Vietnamese volunteer listens to a speaker talk about anti-human trafficking, handled by the Women's Rescue Foundation of Taipei, in Taipei May 4, 2007. The story of Vietnamese women has prompted Taiwan and Vietnam -- whose 75,000 nationals are the island's largest non-Chinese immigrant group -- to get tougher on cross-border marriages to stop fraud and illegal residency following break-ups. Picture taken May 4, 2007. To match feature BRIDES-TAIWAN. REUTERS/Claro Cortes IV (TAIWAN)