SEOUL, SOUTH KOREA - OCTOBER 26: Bulgarian Labor and Social Policy Minister Totyu Mladenov (L-first row) and Jeon Jae-Hee, Minister for Health, Welfare and Family Affairs of Korea, sign while Bulgarian President Georgi Parvanov (L-back) and South Korean President Lee Myung-Bak (R-back) observe the signing ceremony of the social security between Bulgaria and South Korea at the presidential Blue House on October 26, 2009 in Seoul, South Korea. Bulgaria and South Korea met to discuss economic exchanges and to strengthen bilateral relationships in trade, culture and diplomacy.