On February 10, local time, the White House posted a message on social media X saying that President Trump signed a document that day announcing a 25% tariff on all US imported steel and aluminum. In addition, the latest measures also cancel the steel and aluminum duty-free quotas and exemption policies for some trading partners. Trump also said that so-called "reciprocal tariffs" will be imposed on products such as chips, automobiles, and medicines. The new tariff measures will take effect on March 4. This move will cause a shock to the global steel and aluminum market demand and prices. International steel and aluminum prices may fluctuate due to changes in US demand and adjustments to trade barriers, affecting the operations of steel and aluminum production and trading companies.