" Between 2006 and 2013, Chinese gas consumption had tripled. Yet despite the decade of negotiations, the “big deal” on gas was mainly stuck on one question—price. Moscow wanted prices commensurate with what it charged Europeans and indexed to oil (which was still high), while Beijing wanted lower prices in line with domestic energy prices and competitive with coal. "

― Daniel Yergin , The New Map: Energy, Climate, and the Clash of Nations