Secretary for Economy and Finance Mr Leong Vai Tac, Secretary for Social Affairs and Culture Mr Tam Chon Weng, and Secretary for Transport and Public Works Mr Raimundo do Rosário, attend a seminar regarding relation between the “One country, two systems” principle and the country’s reform and opening-up strategies, organised by an association for Basic Law promotion (Associação de Divulgação da Lei Básica de Macau).