China decided to raise the export tariff on coke to 40 percent from 25 percent, and lift the rate on coking coal to 10 percent from 5 percent, the Ministry of Finance has said in a statement.

It also said that export tariffs on other metabituminous coal has been temporarily set at 10 percent.

The tax rises will come into effect from tomorrow, according to the statement. It did not say how long the taxes would be in place for however.