China’s Cnooc Extends Oil Output Lead Over Rival Sinopec: Chart

Cnooc Ltd. expanded its lead over Sinopec as China’s largest oil and gas producer behind behemoth PetroChina Co. Sinopec, officially known as China Petroleum & Chemical Corp., has relied on its status as the world’s largest crude refiner to weather the worst energy crash in a generation, even as its output was overtaken by a rival with a market capitalization more than one-third smaller.

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