(150417) -- WASHINGTON D.C., April 17, 2015 (Xinhua) -- (R-L) German Finance Minister Wolfgang Schaeuble, U.S. Federal Reserve Chair Janet Yellen, Chinese finance minister Lou Jiwei and Governor of People's Bank of China Zhou Xiaochuan are seen before a family photo with IMF Managing Director Christine Lagarde (2nd L, front) during the IMF and World Bank spring meetings in Washington D.C., capital of the United States, April 17, 2015. The Group of 20 leading economies (G20) remained "deeply disappointed" with the continued delay in progressing the 2010 International Monetary Fund (IMF) quota reform, G20 finance ministers and central bank governors said in a communique on Friday. (Xinhua/Yin Bogu)