SEOUL, May 21 (Reuters) South Korea President Moon Jae-in announced today his choices for finance minister, foreign minister, and the top security advisor role in his new government. Moon told a media briefing that he had appointed former vice finance minister Kim Dong-yeon as deputy prime minister and finance minister, while a United Nations senior adviser on policy Kang Kyung-wha was tapped as the next foreign minister. Moon also named Chung Eui-yong, his top foreign policy adviser during the presidential election campaign, as his national security adviser. REUTERS PY 0809