The exports of Angolan oil to the Mainland surged to an average of 1.17 million barrels a day last month, a 63.5-percent increase in year-on-year terms, according to data from the Chinese General Administration of Customs.

The Reuters news agency reports Angola was the second-biggest supplier of oil to the Mainland in January.

Saudi Arabia was the largest crude oil supplier, delivering 1.18 million barrels a day, and Russia was ranked third, with the exports of 1.08 million barrels a day.