Unbridled printing of dollars is the biggest risk to the global economy, an adviser to the Chinese central bank said in comments published on Thursday, a day after the Federal Reserve unveiled a new round of monetary easing. China must set up a firewall via currency policy and capital controls to cushion itself from external shocks, Xia Bin said in a commentary piece in the Financial News, a Chinese-language newspaper managed by the central bank. "As long as the world exercises no restraint in issuing global currencies such as the dollar -- and this is not easy -- then the occurrence of another crisis is inevitable, as quite a few wise Westerners lament," he said. Li Daokui, another academic adviser to the central bank, said loose money in the United States would translate into additional pressure on the Chinese yuan to appreciate. "A certain amount of capital will flow into China, either through Hong Kong or directly into the mainland," Li said. But he added that Beijing would stick to its own gradual pace in managing the yuan's rise. He also said that big gains in U.S. midterm elections by Republicans, who are seen as more friendly to free trade, had made him "a bit relieved" because political calls for China to let the yuan rise would likely quiet down. The Federal Reserve launched a fresh effort on Wednesday to support the struggling U.S. economy, committing to buy $600 billion in government bonds despite concerns the program could do more harm than good.

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