Workers inspect an electrolyte workshop of a new energy material company at Huazhou District of Weinan City, northwest China's Shaanxi Province, Feb. 22, 2020. Besides working on prevention and control of the novel coronavirus pneumonia, the company has stepped up production to ensure raw material supplies to customers at home and broad amid strict prevention and control measures against the novel coronavirus. (Xinhua/Tao Ming)

Energy supplies including coal and oil were largely sufficient in China as a majority of mines and refineries resumed operation, the National Development and Reform Commission (NDRC) said Sunday.

As of Thursday, coal stockpiles at the country's plants were adequate for 27 days of consumption, while those in Hubei, the epicenter of the novel coronavirus outbreak, were sufficient for 54 days of use as of Saturday, according to information from a press conference on Sunday.

By Saturday, the coal sector was running at 76.5 percent of capacities, which reached 3.17 billion tonnes. On Saturday alone, output came in at 8.33 million tonnes, doubling the production on Feb. 1.

Stocks of both refined oil and natural gas remained high, with oil stockpiles exceeding 21.1 million tonnes by Friday.

The NDRC pledged to closely monitor supply-demand changes in the energy sector as demand is set to pick up with more business restoring activities.