Regarding US President Donald Trump's decision to slap a 50% tariff on copper imports on the grounds of national security, Mao Ning, spokesperson of China's Ministry of Foreign Affairs (MoFA), said during a regular press conference that China's position on this issue is very clear.China consistently opposes the broadening of the national security concept and believes that no winners will emerge from tariff wars and trade wars, Mao stressed. Abusive tariffs won't benefit any party.Related NewsPPI YoY for Jun in China is -3.6%, lower than the previous value of -3.3%. The forecast was -3.2%.