The US Federal Reserve's second round of quantitative easing, or QE2, will bring huge challenges to emerging economies, Vice Finance Minister Zhu Guangyao said at a seminar on Nov 6, the Shanghai Securities News reported on Monday.

On Nov 3, the Fed announced its plan to purchase $600 billion worth of government bonds to prop up the ailing economy.

Zhu said the current US trouble resulted from the absence of the "bolstering" role of capitals to the real economy, instead of insufficient liquidity.

He warned newly-added liquidity would flood the US stock market as well as flow into emerging markets to seek profits, posing great challenges to those economies. Many of them would have to take measures to restrict capital inflows, Zhu added.

Chinese economists are worried that excessive liquidity as a result of QE2 would flow to emerging countries including China and Brazil, the paper said.

Zhou Xiaochuan, governor of the People's Bank of China, the central bank, said earlier at an economic forum that QE2 was "not likely" to benefit the global economy although it might help the US boost employment and keep a low inflation rate.

Zhou said China will work to prevent abnormal capital inflows by stepping up foreign exchange controls and maintaining overall liquidity at a proper level.