Deputy Prime Minister and Finance Minister Koo Yun-cheol (center) poses with Bank of Korea Assistant Gov. Kwon Min-soo (second from left), Hana Financial Group Chairman Ham Young-joo (second from right), Hana Bank CEO Lee Ho-sung (far right) and Finance Ministry Senior Deputy Director Moon Ji-sung at Hana Infinity Seoul on Monday as they mark the launch of South Korea's near-24-hour dollar-won trading system.