China's President Hu Jintao and his wife Liu Yongqing arrive at the airport in Seoul, November 11, 2010, on the first day of the G20 Summit. World leaders are gathering in Seoul on Thursday and Friday for the Group of 20 summit aimed at safeguarding the global economic recovery and defusing trade and currency tensions. REUTERS/Romeo Ranoco (SOUTH KOREA - Tags: POLITICS BUSINESS)