China today warned the United States of necessary measures if it imposes tough trade sanctions against Beijing's steel and aluminium exports. Director at China's commerce ministry, Wang Hejun in a statement said, if the US' final decision affects China's interests, Beijing will take necessary measures to defend its rights.<br/> <br/>The US Commerce Department on Friday recommended imposing heavy tariffs on China and other countries to counter a global glut in steel and aluminium. The move gives Trump the opportunity to strike a highly public blow for his America first trade policy.<br/> ' <br/>The US and EU argue Chinese overproduction is heavily subsidised by the state and has depressed world prices, hurting their own domestic production.<br/><br/>