BEIJING — China's raw coal output sustained steady growth in May as policy measures to ensure energy supply and stabilize prices have taken effect, official data showed.

The output rose 10.3 percent year-on-year to 370 million metric tons last month, according to the National Bureau of Statistics.

The growth rate was 0.4 percentage points lower than that in April, the bureau said.

Coal imports shrank last month. China imported 20.55 million tons of coal in May, down 2.3 percent year-on-year.

In the January-May period, the country's raw coal output rose 10.4 percent year-on-year to 1.81 billion tons, while imports dropped 13.6 percent to around 96 million metric tons, the data showed.