US President Donald Trump has imposed steep new tariffs on imported steel and aluminium, drawing criticism at home and abroad.
Many have warned of a global trade war, but the move is seen as a political win for Mr Trump and could give a boost to Republicans ahead of the mid-term congressional election in November.
Mr Trump temporarily exempted Canada and Mexico from the tariffs - 25 per cent on imported steel and 10 per cent on imported aluminium - which go into effect on March 23.
China said it resolutely opposed the tariffs, and that they would "seriously impact the normal order of international trade".
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