South Korean oil refiner S-Oil on Friday held an annual New Year’s trekking event with some 120 company staff in Gyeonggi Province and fundraised 30 million won ($22,488) for a social welfare group. S-Oil President and Head of Operations Park Bong-soo, President and Head of Corporate Strategy & Services Ryu Yul, President and Head of Marketing & Sales Ahn Jong-bum, and new employees joined this year.