The move came one day after filings showed the company is ready to sell some of its largest oilfield subsidiaries, which have reported declining revenues over the past few years.
On 28 June, Xinjiang Dushanzi Tianli High & New Tech said it was in talks to buy CNPC's oilfield services assets, which may include China Petroleum Pipeline Bureau and China Petroleum Engineering and Construction, according to a filing to the stock exchange in Shanghai.
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