US President Donald Trump's recent threat to impose a 25 percent tariff on any country "doing business with" Iran has once again injected uncertainty into global trade and raised fresh concerns about the stability of China-US economic relations. While details of the proposed measure remain vague and its legal basis unresolved, the signal it sends is troubling: unilateral tariff threats risk undoing the hard-won progress achieved through dialogue and cooperation in recent months. 美國總統唐納德·特朗普近期威脅稱，將對任何“與伊朗開展商業往來”的國家征收25%的關稅，此舉再次為全球貿易注入不確定性，並引發外界對中美經濟關系穩定性的新的擔憂。儘管該措施的具體細節仍不明確，其法律依據亦尚未厘清，但其釋放出的信號令人不安：單邊關稅威脅可能抵消近幾個月來通過對話與合作所取得的來之不易的進展。 A trading partner of Iran, China's position on the issue is clear and consistent. As Foreign Ministry spokeswoman Mao Ning stated in response to questions on the matter on Tuesday, tariff wars have no winner...