Managing Director of the International Monetary Fund (IMF) Christine Lagarde (1st L) and IMF Economic Counsellor and Director of Research Maurice Obstfeld (2nd L) attend a press conference on Update of the World Economic Outlook in Davos, Switzerland, Jan. 22, 2018. The IMF raised its global growth forecast for 2018 and 2019 on Monday by 0.2 percentage point to 3.9 percent, due to increased global growth momentum and the expected impact of the recently approved U.S. tax policy changes. (Xinhua/Xu Jinquan)