U.S. Federal Reserve System chair Janet Yellen throws the astonishing remarks that the Fed is likely to restart the non-conventional monetary policy, including QE, to deal with the outbreak of the financial crisis. Anbound's chief researcher Chan Kung pointed out that when the technological innovation is in a dormant period and under the circumstance that the effective demand cannot readily appear, the US economy can only rely on low interest rates to maintain the current prosperity; this is in fact the source of the financial crisis and everything else is capital surplus.