please read the article 

http://down.mofa.go.kr/us-en/brd/m_4497/view.do?seq=761631&srchFr=&srchTo=&srchWord=&srchTp=&multi_itm_seq=0&itm_seq_1=0&itm_seq_2=0&company_cd=&company_nm=&page=1