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PetroChina

As its name suggests, PetroChina Company Ltd is the listed arm of state-owned China National Petroleum Corporation (CNPC). It is China's biggest oil producer, and is listed in Hong Kong, New York, and Shanghai.

PetroChina to lift gas output over 5 years

PetroChina, the largest oil and gas producer, aims to raise gas output by an average rate of 10.6 per cent annually in the next five years, despite facing technical challenges in developing what it describes as China's largest gas discovery in decades.