The state-controlled company saw its profit fall to 20.2 billion yuan ($3 billion) last year, compared to 60.1 billion yuan in 2014.
The group also saw sales drop by 32.8% in the period to 146.5 billion yuan compared to 218.2 billion year-on-year, due to the declining oil prices.
Production, however, increased by 14.6% year-on-year, with net oil and gas production reaching 495.7
