The volume of coal transported by trains and ships in China saw a surge in October and November amid the country's solid efforts to ensure stability in coal supply during this winter, official data showed.

The proportion of coal in China's total energy consumption dropped from 72.4 percent in 2005 to 56.8 percent in 2020.

"Once the prices move outside of the reasonable range, (we will) take timely measures to regulate the prices," the NDRC said.

Coal and power trade between China and Russia has also been on the rise.

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