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The predecessor of CNPC was the Ministry of Petroleum Industry of the People's Republic of China, which was founded in July 1955, supervising the exploration and development of oil and gas resources in China.

China National Petroleum Corporation

China National Petroleum Corporation was established on September 17, 1988 on the basis of the Ministry of Petroleum Industry, mainly in charge of oil and gas upstream operations.

China National Petroleum Corporation (Group)

On July 27, 1998, China National Petroleum Corporation was reorganized to become an integrated group with businesses covering oil and gas upstream and downstream operations, as well as oilfield services and engineering construction. On December 19, 2017,as approved by the State-owned Assets Supervision and Administration Commission (SASAC) of the State Council, CNPC is reorganized from an enterprise owned by the whole people to a limited liability company (wholly owned by the State). All business activities, assets, credentials, creditor's rights, debts, etc., as of the date of reorganization will survive and be inherited by the reorganized company, with the company's shareholders, place of business, legal representative, scope of business, etc. remaining unchanged.

PetroChina was established under the Company Law and the Special Regulations on the Overseas Offering and Listing of Shares by Joint Stock Limited Companies on November 5, 1999. The American Depositary Shares (ADS) and H shares of PetroChina were listed on the New York Stock Exchange on April 6, 2000 (stock code: PTR) and the Stock Exchange of Hong Kong Limited on April 7, 2000 (stock code: 857) respectively. It was listed on Shanghai Stock Exchange on November 5, 2007 (stock code: 601857).

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