The country’s biggest oil and gas producer reported profit attributable to shareholders of 531 million yuan ($80 million), down from 25.4 billion yuan in the same period of last year.

Its turnover dropped 15% to 739.1 billion yuan from 877.6 billion a year earlier due to lower prices for crude, natural gas and refined products.

“During the period, the company faced the most difficult period for its production and operation since its listing, with the realised crude oil price and natural gas price decreasing by 36.5%