A labourer walks toward the Jidong Nanpu oilfield in Bohai Bay of north China's Hebei province May 10, 2007. China's newly found oilfield in Bohai Bay has a reserve of one billion tons, or about 7.35 billion barrels, the largest discovery in the country over four decades, announced the China National Petroleum Corporation, Xinhua News Agency reported. [newsphoto]

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