PRIME Minister Hun Sen will head to Seoul on May 31 the Ministry of Foreign Affairs confirmed Tuesday, on a five-day visit that will focus on South Korean investment in the Kingdom. The trip is scheduled to include a meeting with potential investors, Koy Kuong added: "Samdech will take that time to attract investors." Hun Sen is also scheduled to sign a memorandum of understanding on mineral exploration with South Korean President Lee Myung-bak. South Korean investment in Cambodia fell to US$472.89 million in 2008 from $629.49 million in 2007.