The US Trade Representative recently announced an inquiry into China's green technology sector, which will include investigations into rare earths policies, wind and solar power.

中国商务部在美国宣布的调查次日表示：“美对中国的清洁能源政策采取行动，传递的信号将是美国并不支持中国改善环境的努力。”

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Robert Zoellick, the US Trade Representative, said the White House was "disappointed" with the outcome.

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Mr Zoellick was a former US trade representative before becoming Ms Rice's deputy in early 2005.

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"Government-authorised piracy would undermine chances for a settlement, " said a spokeswoman for the US Trade Representative's office.

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