PetroChina Company Limited (Simplified
zh|s=), (Traditional
zh|t=) (
Sehk|0857,
SSE|601857,
nyse|PTR) is a Chinese oil and gas company and is the listed arm of state-owned China National Petroleum Corporation (CNPC), headquartered in Dongcheng District, Beijing. It is China's biggest oil producer. and subsequently entered trading on the Shanghai index.
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