After the US Supreme Court struck down most of Donald Trump’s broad tariff measures, a spokesperson for China’s Ministry of Commerce of the People's Republic of China (MOFCOM) said on Monday that China has consistently opposed unilateral tariff increases in any form, according to Global Times.

Responding to the ruling, the spokesperson reiterated that trade wars produce no winners and that protectionism ultimately leads nowhere. The statement further argued that the unilateral tariffs imposed by the United States — including reciprocal tariffs and those linked to fentanyl — violate international trade rules as well as US domestic law, and fail to benefit any party.

On Friday, the Supreme Court of the United States ruled against Trump’s key trade policy, stating that the President did not have the authority under the International Emergency Economic Powers Act (IEEPA) to impose sweeping import duties on goods from most US trading partners. The Court concluded that IEEPA does not authorize the President to levy tariffs.

In a 6–3 decision authored by Chief Justice John Roberts, the majority found that while IEEPA allows regulation of importation, it does not specifically mention tariffs or taxation. Roberts wrote that no statute shows Congress using the term “regulate” to grant taxing power, and no previous President had interpreted IEEPA in that way. Justices Brett Kavanaugh, Clarence Thomas, and Samuel Alito dissented. Roberts emphasized that the Court was not claiming expertise in economic or foreign policy matters but was simply fulfilling its constitutional duty under Article III, ultimately determining that IEEPA does not permit the President to impose tariffs.

Highlighting the importance of cooperation, the MOFCOM spokesperson stated that experience has shown China-US collaboration benefits both nations, whereas confrontation harms both sides. Beijing urged Washington to remove all unilateral tariffs imposed on its trading partners. The spokesperson also noted that China is closely watching reports that the US may pursue alternative approaches, such as trade investigations, to maintain tariff measures, and vowed to protect China’s legitimate interests.

Trump announced on Saturday that he intends to raise the previously announced 10 percent global tariff to what he described as a “legally tested” 15 percent level. In a post on Truth Social, he said his administration would soon determine and implement new tariff measures as part of his “Make America Great Again” agenda. A White House official also confirmed that Trump is scheduled to visit China from March 31 to April 2.