SK Group is the third largest multinational enterprise in South Korea, mainly focusing on energy and chemical industry and information communication as two pillar industries. Two companies under SK HOLDINGS are among the top 500 companies in the world. SK and its subsidiaries have over 30000 employees, 124 offices, and subsidiaries worldwide. Ranked 57th in the Fortune 500, with an annual sales revenue of $80.8 billion. In the 2013 Fortune Global 500 ranking, SK ranked 57th. SK Group's Chinese business began before the establishment of diplomatic relations between China and South Korea in 1992. SK has over 10000 employees in China and operates in approximately 40 regions across the country.