Russia's President Vladimir Putin (R, back) and his Chinese counterpart Xi Jinping (L, back) applaud while Rosneft President and Chairman of the Management Board Igor Sechin (R, front) exchanges documents with President of China National Petroleum Corporation (CNPC) and Vice Chairman and President of PetroChina Zhou Jiping during a signing ceremony at the Kremlin in Moscow March 22, 2013. REUTERS/Sergei Karpukhin
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