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"Russian gas company Gazprom wants Beijing to pay in advance should it shore up a commercial contract with the state energy company, sources said."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Business_News/Energy-Industry/2011/07/11/Gazprom-wants-China-to-pay-up-front/UPI-40421310390584/?rel=54571311598603>